Tenzin C. Trepp

ER: Existence, Reality and Time is a philosophical book that advances the project first initiated in Time Explained. Where the earlier volume introduced the central intuitions and initial architecture of Existential Realism (ER), this work moves decisively into its conceptual core. With both analytic precision and conceptual clarity, it examines how existence unfolds strictly in the present, how reality meaningfully relates to past and future, and why becoming—rather than static being—must anchor any adequate theory of time. Addressing questions left open in its predecessor, the book refines and strengthens the framework of ER, presenting a coherent temporal model that brings lived experience and scientific understanding into systematic alignment.

The experience of beauty is often described as if it reveals an objective value in the world, yet aesthetic judgments vary across individuals and cultures. This paper develops a “realistic constructivist” framework to reconcile this puzzle. Drawing on predictive processing models in cognitive science and philosophical insights from ecological and enactive approaches, it argues that beauty is not a mystical direct access to an abstract value. Instead, beauty emerges as a stability-achievement in an organism’s perception – a state of fluent, confidence-rich prediction shaped by evolutionary biases and refined by cultural learning. Such an account maintains that aesthetic values are constructed by minds, but in a way that remains world-tracking: our constructive processes are constrained by the structure of the environment and calibrated socially, yielding relational invariants that multiple observers can share. The paper explicates aesthetic properties as patterns that reliably stabilize attention, affect, and action for humans under shared embodied and cultural conditions. This approach illuminates why beauty feels “real” despite its subjective elements, and how it can be both biologically grounded and culturally diversified. The account is applied to examples in art and design, and it addresses major objections from evolutionary debunking (the idea that evolved tastes are not truth-tracking), cultural relativism, and robust aesthetic realism. In sum, beauty is reinterpreted as a collaboratively constructed yet real feature of our experience – a meaningful pattern that arises through adaptive perception and becomes public through communal training and agreement.

Cognition may span a hierarchy from the simplest cells to human reasoning and even artificial intelligence, yet a unifying principle underlies these diverse processes: the active construction of reality. This paper argues that cognition is fundamentally constructive – organisms and cognitive systems build, maintain, and refine internal or external models to guide their behavior. We survey evidence across multiple domains, including biology (cellular signaling and plant behavior), neuroscience (perception, attention, learning, and neural plasticity), collective intelligence (social insects and human societies), and machine learning (artificial neural networks and AI). In each case, cognitive activity emerges not as passive registration of information but as an adaptive model-building process shaped by feedback loops and self-organization. We contrast this constructivist framework with reductionist and representationalist views that treat knowledge as a static encoding of an objective world. Across domains, a continuum of constructive cognition becomes apparent, yielding philosophical insights into the nature of knowledge and mind. We discuss how this perspective enriches cognitive science and epistemology, suggesting that to know is to continually construct viable models of reality, and to exist as a cognitive agent—biological or artificial—is to actively model the world one inhabits.

This monograph introduces Existential Realism (ER), a novel ontological framework designed to resolve the long-standing impasse between presentism and eternalism. At its core, ER proposes a rigorous two-tier ontology that distinguishes between existence and reality. Existence is defined as concrete, material presence that is empirically accessible in the "now." Reality, by contrast, is a broader category encompassing the causal traces of the past and the anticipated potentials of the future. While acknowledging the presentist view that only the current moment "exists" in a concrete sense, ER rejects the conclusion that the past and future are unreal. Instead, it posits that the past remains real through its enduring physical effects and information (demanifestation), while the future is real as a set of emerging possibilities and tendencies (manifestation). This metaphysics aligns with the processes of wavefunction collapse and measurement, placing the act of becoming at the center of the world's structure. The monograph explores the implications of ER across several key domains: • Physics: It reconciles the "moving now" with relativity and quantum nonlocality, offering an alternative to the static "block universe" model. • Cognitive Science: It models how memory and anticipation serve as cognitive bridges between the existent present and the real past and future. • Ethics: It establishes a basis for moral responsibility and duties toward future generations by framing them as real, though not yet existent, entities. • Cosmology: It interprets black holes and cosmic horizons as transitional thresholds where existence cycles back into reality. Ultimately, Existential Realism offers a robust alternative to traditional models, vindicating the lived experience of time's flow as a fundamental, lawful migration of being.

At its core, Time Explained is a book-length interdisciplinary investigation into the nature of time. Moving beyond linear chronology, it examines time’s subjective, objective, and philosophical dimensions, introducing the concept of the World of Becoming and positioning temporality as the fundamental medium through which self and reality are constructed. Drawing on cognitive science, physics, and philosophy, the text analyzes psychological time—especially the distortion of duration in high-stress situations—and demonstrates how attention, memory, and cognitive structuring actively assemble temporal experience. By offering a systematic introduction to the foundations of temporal reality, the book challenges static conceptions of existence and emphasizes the dynamic structure of human experience.

Fabrica Mundi is a book devoted to a sustained examination of cognitive constructivism and the formative power of mental models. Centered on the thesis that understanding of world and self arises through active construction—both individual and social—the work traces how internal frameworks, shaped by experience, categorize, interpret, and anticipate reality. The title signals this ongoing process of world-making. Integrating developmental psychology, neuroscience, philosophy of science, and technological analysis, the book explores guided participation, the neurobiological basis of memory and perception, and the limits of objectivity within cognitively mediated access to truth. It extends this inquiry to virtual environments and artificial systems that reshape human cognition, and concludes with a reflection on existential identity: the subjective world as a personal universe contingent upon cognitive activity.

This monograph offers a rigorous and application-focused synthesis of classical Stoic texts, drawing extensively from the primary sources of Seneca, Marcus Aurelius, Epictetus, Musonius Rufus, and Cicero. It engages critically with modern scholarship, notably the work of Pierre Hadot, to re-frame philosophy as an indispensable practical discipline for achieving human flourishing (Eudaimonia). The text is fundamentally a guide to Stoic applied ethics, employing an intentional focus on the ancient practices of Hypomnemata (personal records) and the cognitive discipline of Prosochē (attentive awareness). The methodology illustrates how the cultivation of the four cardinal excellences—wisdom, courage, temperance, and justice—provides a robust framework for self-mastery and rational discernment. By systematically examining the core Stoic claim that distress arises from subjective judgments rather than external circumstances, this work establishes a comprehensive approach to cultivating inner tranquility (Ataraxia) and intentional living in a contemporary context. Availability and Acquisition The work is distributed globally through major commercial channels and is available in multiple formats: Paperback Edition: Lulu Hardcover Edition: Lulu E-book Edition: Lulu Audiobook (Google Play): Google Play Audiobook (Apple Books): Apple Books Audiobook (Spotify): Spotify Further Distribution: Available through major academic and commercial retailers, including Amazon, Barnes & Noble, Booktopia, Bookshop, and Gardners.

Existential Realism (ER) establishes a foundational distinction between Existence (the indexical, present, and empirical) and Reality (the structural, informational causal manifold). This framework promises to navigate the longstanding deadlock between Presentism and Eternalism in the philosophy of time, but it introduces two critical ambiguities. First, the ontological status of the past: Does a past event cease to be real if its physical "traces" vanish due to entropy? Second, the ontological status of the future: Does assigning a "gradient of reality" based on causal determinacy risk reducing reality to mere predictability (i.e. conflating ontology with epistemology)? This paper addresses both challenges by rigorously defining Reality as information within the causal manifold of the universe. It argues that the past is safeguarded through the concept of Scrambled Reality, which preserves an event’s reality as an irreducible informational residue even when observable traces fade. It further contends that the future’s gradient of being is an ontological gradient of potentiality, restricted only to fundamental indeterminacies (e.g. quantum collapses) rather than our epistemic uncertainty about classically deterministic chaos. In doing so, ER offers a coherent alternative to standard Presentism and Eternalism by affirming genuine temporal becoming and free will, without rendering the future a complete fiction. The result is a robust, non-reductionist theory of time that clearly distinguishes between ontology and epistemology in both temporal directions.

The nature of time remains a profound challenge in physics. Relativity’s four-dimensional spacetime suggests a “block universe” where all events – past, present, future – equally exist, contradicting our experience of an unfolding now. Quantum mechanics, by contrast, introduces indeterminacy and wavefunction collapse that single out the present moment when possibilities become actual. Thermodynamics adds an “arrow of time,” distinguishing past from future via entropy increase, yet fundamental laws are time-symmetric. Cosmology confronts temporal boundaries: a Big Bang origin, a potential end of time, and horizons beyond which events seem inaccessible. We synthesize Existential Realism (ER) – a present-centric two-tier ontology – as a resolution framework that reconciles these puzzles without altering empirical predictions. ER posits that only the present exists (is concrete), while past and future remain real as structured but non-present aspects of the world. This simple distinction – existence vs. reality – yields a dynamic cosmos where events continuously migrate from real possibility to present existence and into real historical facts. We show how ER preserves Lorentz symmetry while restoring an objective becoming, aligns quantum physics with a single actual world (embracing collapse without “many-worlds”), grounds the thermodynamic arrow and causality in the accumulating record of the present, and provides a coherent picture of cosmological time-beginnings, endings, and information flow across horizons. Potential experimental implications are discussed, from quantum measurements to black hole observations. ER emerges as a rigorous yet intuitive ontology bridging physics and the lived experience of time, suggesting that time’s flow is no illusion but rather the lawful collapse, transition, and migration of reality into existence – one present moment at a time.

Philosophical theories of time often veer into two opposing pitfalls: solipsistic idealism, which makes the mind the generator of the present moment, and mystical eternalism, which treats time as an illusion behind which some eternal realm or spiritual order hides. Both extremes undermine a sober understanding of time’s reality. In one, consciousness is elevated to a world-creating force; in the other, material change is dismissed as mere appearance. Existential Realism (ER) was developed as a third path that avoids these distortions. It is a framework grounded in the primacy of matter over mind – asserting that existence (the material present) is what gives rise to consciousness and experience, not the other way around. ER distinguishes sharply between what exists and what is real: only the present moment and its contents truly exist, whereas past and future are real as parts of an objective temporal structure, but they do not exist in the present. By making this two-tier distinction, ER preserves the reality of time’s flow without lapsing into either naive presentism or a static block universe. In short, ER affirms that existence grounds consciousness – the physical world’s ongoing process is primary – while consciousness plays a secondary, observational role. This paper will defend that “matter over mind” stance in detail, clarifying ER’s position and protecting it against misinterpretations. We will argue that ER is a rigorously realist and scientifically coherent philosophy of time, one that requires facing reality with honesty and philosophical courage rather than taking refuge in comforting fictions. The sections that follow articulate ER’s core commitments: the primacy of matter (Matter Over Mind), an honest accounting of what is and is not present (Ontological Honesty), the empirical support for ER from science (Empirical Grounding and Continuity with Science), and the implications of ER’s no-nonsense stance (Philosophical Courage), before concluding with a reaffirmation of ER’s identity as a realist philosophy of time.

Existential Realism (ER) maintains that existence is not contingent on observation or consciousness. The present moment’s actuality does not depend on a human mind to perceive it. Rocks deep in space, microbial life, and distant galaxies all exist now without any observer. By decoupling being from witnessing, this framework adopts an explicitly anti-anthropocentric stance. ER’s two-tier temporal framework—distinguishing existence (the present, empirically accessible domain) from reality (the broader causal field including past and future)—ensures that time and existence are understood as objective features of the world, not only as products of human perspective. This stance safeguards ER against subjectivist distortions, panpsychist temptations, and mystical claims that consciousness somehow creates the present. In sum, ER asserts a cosmos that continually becomes and unfolds on its own terms, with consciousness playing at most a disclosive role rather than a constitutive one. This paper articulates ER’s anti-anthropocentrism through illustrative examples and critical contrasts with observer-centric philosophies of time, defending a view of existence that holds with or without a witness.

This paper examines three quantum-time phenomena — the Quantum Zeno Effect, Causal Set Theory, and Loop Quantum Gravity — and evaluates their implications for Existential Realism (ER). Each offers a unique perspective on how time emerges, freezes, or discretizes, and each is elucidated by ER’s distinction between existence (the present, empirically manifest now) and reality (the broader domain of traces, causal scaffolds, and potentials beyond the present). We discuss how continuous observation in the Quantum Zeno Effect illustrates the fragility of becoming under constant scrutiny, how Causal Set Theory models a discretely growing reality that aligns with a becoming universe, and how Loop Quantum Gravity’s challenge of a fundamentally timeless world can be reconciled by ER’s two-level framework of existence and reality. We conclude that ER accommodates all three phenomena within its metaphysical structure, demonstrating its flexibility in bridging physics’ abstractions and the lived reality of temporal passage.

Existential Realism (ER) proposes a radically present-centered framework in which existence is fleeting and contingent, with only the now concretely actual. Past entities have ceased to exist and future entities have not yet come into existence; nothing endures except the ever-shifting present. This paper develops ER’s ontology of contingency, illustrating how it dispenses with “safety nets” in the philosophy of time – from eternalist block universes to timeless metaphysical guarantees – leaving a worldview that is fragile but honest. We argue that ER’s emphasis on the fragility of existence resonates with long-standing existentialist themes of temporality and finitude while avoiding mysticism: it provides a clear ontological account of why only presence persists. The discussion contrasts ER with more “comforting” ontologies – including eternalism (which imagines all moments eternally exist), simplistic presentism (which denies reality to the non-present), and religious or mystical views (which promise timeless continuance) – and shows how ER undercuts these assurances. Finally, we explore the implications of embracing temporal fragility, suggesting that meaning and ethical responsibility are enhanced, not undermined, by recognizing that every existence is transient.

This paper isolates two structural features of time often softened or overlooked in philosophy: the irretrievability of the past and the openness of the future. Within the framework of Existential Realism (ER), these features are not secondary implications but primary truths about the world’s temporal structure. The past persists only in traces – fossils, memories, records – which testify to what was without preserving it. The future consists only of structured potentials – genuine possibilities that have no existence until they become present. By treating loss (past) and openness (future) as twin commitments, ER develops a perspective that avoids both eternalist comforts and fatalist despair, grounding scientific realism and moral responsibility in a stance of temporal honesty.

Quantum entanglement – famously dubbed “spooky action at a distance” – challenges our classical intuitions of separateness and locality. This paper, in the tone of the Existential Realism (ER) series, reinterprets entanglement not as mysterious superluminal influence but as the projection into our 3D existence of unified structures residing in a deeper, nonlocal reality. ER’s two-tier framework, distinguishing present existence from a broader reality, is applied to make sense of nonlocal correlations: only what is present exists, yet far more is real (causally and informationally) beyond the present moment. We argue that entangled particles are inherently connected in the domain of reality such that their seeming instant influence is merely the revelation of an underlying unity rather than an exchange of signals. This perspective casts quantum nonlocality as evidence that 3D space and its separations are emergent – a flattened, lower-dimensional view of a more holistic order. Using ER’s metaphors of collapse, transition, and migration, we describe how entangled potentials collapse into actuality together, reinforcing a “shared now” without violating relativity. We draw parallels to holographic projections and informational reality: if our tangible world is akin to a hologram projected from a deeper plane, entanglement may indicate points that are adjacent in that deeper reality but mapped far apart in our space. The ER framework is compared with alternative views – the eternalist block universe, Wheeler’s “it-from-bit” informational ontology, and AdS/CFT’s holographic spacetime – highlighting how ER maintains a dynamic present and single-world causality while embracing a vast interconnected reality. In sum, entanglement’s hidden order exemplifies ER’s core insight: the present exists as the locus of concrete events, yet the full story of those events lies in a wider reality structure that transcends the here-and-now.

Bell’s theorem reveals a profound puzzle: quantum measurements on entangled particles exhibit correlations across spacelike separations that defy classical locality. Traditionally, resolving this “spooky action at a distance” has seemed to demand either a block-universe view (with all outcomes laid out and equally real in a static 4D spacetime) or a retreat from realism (e.g. treating the wavefunction and collapse as mere calculation tools without objective reality). Existential Realism (ER) offers a middle path. Within ER’s two-tier framework, outcomes come into existence only in their local present moments, while entangled correlations remain real as non-present structures that condition and delimit those outcomes. This framework maintains a genuine temporal becoming (only present events are fully actual) even as it acknowledges a deeper causal structure that extends beyond the present. As a result, ER can reconcile quantum nonlocality with a present-centric view of time: the entangled “realities” provide structure across distance, but only manifest as present existences when observed. In this paper, we articulate how Bell nonlocality can be understood within the ER framework – preserving relativistic causality (no faster-than-light signals) and the reality of quantum correlations without invoking an eternal block universe. We show that Bell’s experiment, far from undermining a dynamic present, strengthens the case for ER’s two-tier framework of time by demanding a category of reality beyond immediate existence. Each measurement outcome “collapses” into existence locally, even as a holistic, non-local reality ties the outcomes together. Thus, Bell’s nonlocal correlations become an argument for a nuanced realism of time: one in which only the present exists, but much more than the present is real. The result is a conception of nature that upholds both the physical reality of quantum phenomena and the experiential truth of an unfolding present.

The debate over McTaggart’s A- and B-series – between a dynamic time of past, present, and future versus a static ordering of events – has structured over a century of metaphysical discourse on time. Yet this framework, and attempts like fragmentalism to reconcile its contradictions, may be fundamentally mis-framed. This paper introduces Existential Realism (ER) as a reframing that dissolves the A-/B-series opposition rather than taking a side within it. ER distinguishes existence (the privileged present moment) from reality (the broader temporal domain of past traces and future possibilities), thereby preserving genuine becoming without requiring a fragmentation of the world. We diagnose McTaggart’s paradox as arising from a conflation of existence with reality, and show how separating these categories dissolves the apparent contradiction. In response to fragmentalism’s proliferation of “nows,” ER offers one unified present that migrates through time while encompassing rich temporal reality beyond the moment. The result is a view in which time’s flow is restored as generation without fragments – a single, continuous trajectory of events coming into existence – resolving the paradoxes of earlier frameworks while remaining consistent with relativity and our lived experience.

In this paper, we develop an Existential Realism (ER) perspective on how the three-dimensional present world (the domain of existence) might emerge from a structurally simpler, lower-dimensional informational substrate (the domain of reality). Adopting the holographic principle as a guiding metaphor, we propose that the "now" is a dynamic projection or collapse of deeper real structures into empirical presence. ER’s two-tier framework – distinguishing what exists (present, observable entities and events) from what is real (the wider causal and informational structure, including past and future) – provides the conceptual framework. We argue that becoming can be interpreted as an unfolding or decoding of real informational structure into concrete existence, governed by lawful transitions (manifestation into presence and demanifestation into reality) rather than a static block universe. This approach contrasts with earlier ER work focused on black holes and projection “cracks,” instead offering a general model of projection/becoming. The present moment is treated as a transitional edge where reality’s potentials continuously migrate into actuality and then recede into reality as traces. We conclude that this present-centered, holographic-inspired model preserves the privileged status of the now without reducing reality to only what is present, thus reconciling the flow of time with a robust underlying structure of information and causation.

Existential Realism (ER) is a contemporary ontological framework that sharply distinguishes between existence (the empirically accessible present) and reality (the broader causal web including past and future). By its doctrine, only what is present and observable exists, while past and future entities are real but lack present existence. This paper examines what it would mean to disprove ER by breaching its core empirical constraint: demonstrating an observable, measurable influence of matter outside the present. We outline a rigorous criterion for falsifying ER, requiring a controllable, information-bearing, counterfactually robust influence originating from a non-present event. We then explore hypothetical scenarios that, if realized, would meet this criterion—ranging from superluminal quantum signals and retrocausal experiments to traversable wormholes and “present-sensing” devices—explaining in each case what empirical outcome would count as a true falsifier of ER and why. In counterpoint, we respond from within the ER framework to show why these scenarios remain speculative or inconsistent with known physics, and how ER’s integration of causality, relativity, and measurement constraints withstands such challenges. Rather than seeing ER as an unfalsifiable metaphysic, we argue that its immunity to these exotic tests reflects a deep concordance with physical law: all interactions with matter are bound to the present, while past and future matter, though real, are non-existent and inaccessible except through present traces. In conclusion, we defend ER as an empirically grounded ontology—far from ad hoc, it is rooted in a stable distinction between existence and reality that has broad implications for metaphysics, physics, and epistemology. This reinforces ER’s status as a fruitful philosophy of time that remains standing unless and until experiment accomplishes the seemingly impossible: observing matter, substance, or stuff beyond the now.

Existential Realism (ER) advances a two-tier framework of time, rigorously distinguishing existence – what is concretely present and empirically accessible – from reality, which encompasses past and future events that, while not presently existent, exert causal and informational influence. This paper develops a “dual world” model that overlays ER’s ontological distinction with a phenomenological perspective: the world as experienced by a conscious subject. We argue that cognition – in particular, memory and anticipation – serves as the bridge between these ontological and phenomenological domains. All cognitive acts occur in the present moment (the only locus of existence), yet they refer to that which lies beyond the present (the domain of reality). Thus, remembering and anticipating are presently instantiated neural processes (they exist now) that constructively refer to real past events and real future possibilities which themselves do not exist at present. We integrate insights from phenomenology (Husserl’s retention and protention) and cognitive neuroscience (the brain’s “window of presence,” temporal integration, memory traces, and predictive coding) to show how the mind anchors the absent within the present. This dual-framework clarifies how ER can accommodate lived experience: the structural world of ER (events becoming present and then migrating into reality) is tightly coupled to the phenomenological world of experience (the flowing “now” that retains a just-past and protends an about-to-be). By examining memory as the present reconstruction of a real past, and anticipation as the present simulation of a real future, we demonstrate that cognition naturally realizes ER’s two-tier ontology. Our analysis reinforces ER’s core claim that only the present exists while past and future remain real, by showing that human consciousness itself operates in exactly this fashion: it lives in the present, yet reaches backward and forward in time through traces and expectations. In doing so, we also highlight how ER’s metaphors of collapse, transition, and migration of events (from reality to existence and back) resonate with both brain dynamics and subjective experience. The result is a synthesis in which time’s flow is understood as a continuous process of becoming – one that is at once an objective ontological migration of events (from possible to actual to remembered) and a subjective phenomenological construction of temporal experience. This approach not only bolsters ER with empirical and experiential support, but also offers a fresh, integrated understanding of how cognition bridges existence and reality in our temporally structured world.

Contemplative states of consciousness – such as deep meditative awareness – are not escapes from reality but realignments with existence as defined by Existential Realism (ER). ER’s two-tier ontology distinguishes the immediacy of existence (what is present and empirically accessible now) from a broader reality that includes non-present past and future structures. In practices of sustained present-moment awareness, the mind suspends its habitual engagement with past memories and future projections (which are real but not existent), effectively collapsing our engagement with reality’s extensions into the empirical now. We argue that this collapse is plausibly psychophysiologically measurable, ontologically significant in ER’s terms, and phenomenologically distinctive. Drawing on cognitive neuroscience and ER’s metaphysical framework, we show that the shift from ordinary “extended” cognition to absorbed present-centered awareness correlates with identifiable brain dynamics (e.g. reduced default-mode network activity), illustrating how being present is both an empirical state and an existential mode of alignment with reality’s structure. In sum, contemplation under ER is revealed as a disciplined return to the only place that truly exists – the now – and as such provides a unique bridge between metaphysics and the science of mindfulness.

Time is not only a dimension of the physical world but also a construct of the mind. Existential Realism (ER) offers a present-centered ontology of time, distinguishing existence (what concretely exists now) from reality (the wider web of past and future events that have effects or significance without presently existing) – a “two-tiered” view of temporal being. In brief, ER holds that only the present moment and its contents exist in the full ontological sense, yet reality extends beyond the present: past events and future outcomes do not exist now, but are nonetheless real insofar as they left traces, continue to exert causal influence, or shape well-founded anticipation. This framework reconciles the humility of acknowledging that we directly observe only the present with a robust realism about the world’s structure across time. Prior work in ER has explored how adult brains represent time (memory, anticipation) in line with this ontology, and how cognitive science views time as an actively constructed experience. However, an important question remains underexplored: how does this ontological understanding emerge during childhood? In this paper, we align Piagetian developmental psychology with ER’s metaphysical framework to trace the ontogeny of temporal and ontological understanding. We argue that the child’s mind initially collapses reality into the present – effectively conflating “real” with “now” – and gradually migrates toward a higher-tier temporal realism that mirrors ER’s distinction between existence and reality. The developmental journey from infantile presentism to a mature understanding of time will be outlined through constructivist stages, using ER’s terminology of tiers, collapse, transition, and constructed present to describe the child’s evolving temporal framework. By mapping cognitive development onto ER’s structure of time, we gain insight into how the mind builds a layered reality from the immediate constructed present to an extended timeline. We also identify key markers – the emergence of tense in language, understanding of object permanence and enduring objects, and use of counterfactuals – as evidence of ontological tier transitions in childhood. Finally, we conclude with implications of this developmental perspective for education, introspective self-modeling, and understanding temporal pathologies in cognition.

We explore how Existential Realism (ER) – a present-centric, two-tier ontology – addresses the extreme limits of cosmological time: the beginning and end of time, cosmic inflation and multiverse scenarios, causal horizons, and the emergence or collapse of temporal order. In ER’s framework, existence is confined to the present moment while reality spans past and future structures beyond the present. We apply these principles to cosmology, arguing that events like the Big Bang and any ultimate end of time are not static “edges” of a block universe but transitions in ontological status – moments where time switches on or off. We consider how cosmic inflation and multiverse hypotheses can be reframed such that each causally isolated “bubble” universe has its own present (its own existent content) with others remaining real but not existent. We interpret causal horizons (e.g. the observable universe’s edge) as demarcating the boundary of what can exist for us, without denying the reality of what lies beyond. Bounce cosmologies and time-symmetric models are discussed to show how ER handles a possible “before” the Big Bang or a reversal of the arrow of time. Throughout, we emphasize ER’s conceptual toolkit – collapse, transition, and migration of events – instead of spatial or block metaphors. This approach integrates philosophical and physical perspectives, suggesting that time’s boundaries are not absolute cut-offs but lawful ontological transformations within a present-centered reality. The result is a cosmological picture that engages both physicists and philosophers: one where the present remains central even at the universe’s temporal extremes, and where the flow of time is understood as the continuous becoming of reality.

This paper develops an Existential Realism (ER) account of transitional dynamics: the lawful process by which entities and events manifest (enter into present existence) and demanifest (depart from existence into reality). Within ER’s two-tier ontology, existence denotes the presently actual and empirically accessible domain, while reality encompasses the past and future—structures, causal potentials, and informational traces that are real but not currently existent. We examine how something becomes existent from being merely real, and how it returns to reality once its present existence ends. By articulating these transitions, we operationalize ER’s core insight that time is the ongoing migration of the actual present through a scaffold of real but non-present structures. We argue that manifestation and demanifestation are governed by natural lawfulness without invoking static time-slices or a block universe. Examples from physics (cosmic cycles of formation and dissolution), biology (life’s emergence and death’s aftermath), and phenomenology (memory and anticipation bridging past and future) illustrate the framework. The result is a dynamic ontology of becoming: time’s “transitional edge” is the ever-shifting present where reality continuously actualizes and, having existed, recedes back into the real. ER thus avoids both presentist exclusivity and eternalist stasis, explaining temporal continuity as a lawful crossing between ontological modes.

Modern academic philosophy, with its elaborate theories and technical analyses, often resembles a detailed map disconnected from the terrain of real life. In contrast, ancient Hellenistic and Late Antique philosophies – especially Stoicism and the early thought of Plotinus – viewed philosophy as a way of life, a practical guide to living with wisdom and virtue. This paper argues that contemporary philosophy has strayed far from those roots. The metaphor “the map is not the landscape” will frame our discussion: the conceptual abstractions (the map) that occupy academic philosophy are not the lived experience (the landscape) that concerned the ancients. We will explore how Stoic and Plotinian perspectives highlight the gap between modern philosophy’s focus on analytical maps and the ancients’ commitment to navigating the landscape of human existence. We begin with historical foundations, examining how classical philosophy entwined theory with life practice. We then trace the evolution of the philosophical academy through the Middle Ages and modern period, noting the rise of specialization and scholasticism. The heart of the paper focuses on Stoicism as an “art of living” and Plotinus’s vision of interior spiritual ascent – two exemplars of philosophy as praxis rather than mere theory. In subsequent sections, we diagnose the fragmentation and specialization of present-day philosophy and how it has led to a loss of praxis. Finally, we issue a call for renewal: a reintegration of philosophical inquiry with the quest for living wisely. Our aim is an intellectually rigorous critique that encourages philosophy to return to its ancient role as not only theoretical discourse but also a guide to existential flourishing.

Stoicism, an ancient Greco-Roman philosophy, has experienced a modern resurgence owing to its practical tools for managing emotion and navigating adversity. Founded in Athens by Zeno of Citium in the 3rd century BCE and later developed by philosophers like Epictetus, Seneca, and Marcus Aurelius, Stoicism taught that philosophy should function as a “medicine for the psyche,” treating the emotional and existential ailments of life. In Stoic teachings, disturbances of the mind are seen as arising not from external events but from within—specifically, from our judgments about events. This cognitive framework — famously captured by Epictetus (“Men are disturbed not by things, but by the views which they take of them”) — positions Stoicism as a philosophical ancestor of many principles in modern psychotherapy. Indeed, contemporary therapeutic approaches such as cognitive-behavioral therapy (CBT) have explicitly acknowledged Stoic philosophy as an influence on their development. The convergence between Stoic practices and psychotherapy has given rise to Stoic-based therapies, which integrate exercises and insights from Stoicism into clinical and self-help contexts. This paper provides a comprehensive examination of therapies grounded in Stoic practices. We begin by outlining the theoretical foundations of Stoicism relevant to psychology, including Stoic views on emotions and virtue. Next, we explore the historical and conceptual links between Stoicism and modern psychotherapy, detailing how Stoic ideas underpin techniques in cognitive-behavioral therapy, rational-emotive behavior therapy, and mindfulness-based interventions. We then introduce core Stoic therapeutic techniques – such as cognitive reframing through the dichotomy of control, negative visualization (premeditatio malorum), and mindful self-awareness (prosochē) – and discuss their applications in promoting emotional resilience and rational living. The integration of Stoic practices into treatment will be illustrated with real-world clinical examples and case vignettes, showing how Stoic-based strategies can aid in managing anxiety, anger, depression, trauma, and personality disorders. Throughout, we reference both classical wisdom and current empirical studies that have begun testing Stoic interventions in clinical and educational settings. Finally, we address challenges and critiques of Stoic-based therapy, including potential misunderstandings of Stoicism and its limitations as a stand-alone treatment, emphasizing the importance of an empirically grounded and ethically informed approach. By bridging ancient philosophy and contemporary psychology, this interdisciplinary inquiry aims to demonstrate that Stoic practices – far from being mere historical curiosities – continue to offer valuable tools for psychological wellbeing. The enduring Stoic emphasis on reason, virtue, and mindfulness provides a rich conceptual framework that can complement modern therapeutic techniques. At the same time, empirical scrutiny and clinical experience are vital to adapt these age-old practices to individual needs in the present day. In sum, Stoic-based therapy offers a compelling synthesis of classical wisdom and evidence-based methods — warranting further exploration by practitioners and scholars across psychology, mental health, and philosophy. This paper argues that Stoic thought provides a coherent and practical therapeutic framework—one that prefigures and complements modern psychological practices such as cognitive-behavioral therapy. By examining its theoretical foundations, psychological insights, and practical exercises, we explore how Stoicism offers an enduring model of cognitive-affective regulation.

Contemporary theoretical physics suggests that spacetime and gravity might emerge from deeper informational structures, hinting that our universe could be holographically organized. In this speculative essay, we explore the idea that reality itself has a fundamentally holographic character, using black hole physics and quantum information as guiding clues. Black hole thermodynamics reveals a mysterious link between information and the geometry of space, inspiring the holographic principle that a region’s content may be encoded on its boundary. We survey how this principle—and the notion of an informational universe—intersects with philosophical interpretations of time: from the eternalist block universe view of an unchanging 4D spacetime, to informational realism which posits information as the substrate of existence. Against this backdrop, we introduce Existential Realism (ER), a two-tier ontology distinguishing transient existence from enduring reality. We argue that ER’s framework provides a novel lens for these questions. In ER, the present “now” is like a projection of an underlying informational reality; black holes then appear as ontological cracks where that projection falters, raising profound questions about time, causality, and hidden order. We show how ER’s emphasis on an evolving present and an informationally rich reality can reframe puzzles such as the black hole information paradox and the nature of temporal entropy. This work is intended as a frontier-level exploration: it sketches a consonance between cutting-edge cosmology and a new metaphysical model of time, suggesting that what we call “reality” might indeed be a projection from a deeper order of information and existence.

The observable universe is unimaginably vast, stretching from the tiniest subatomic quark to clusters of galaxies billions of light years across. Yet as staggering as spatial vastness is, an even more mind-bending kind of vastness emerges when we consider different theories of time. Competing models of temporal reality propose wildly different ontologies – different answers to what exists in time – that make the physical scale of the cosmos seem almost modest by comparison. On one view, every moment of history and future already exists in a grand timeless ensemble; on another, every quantum possibility gives birth to an entirely new universe, multiplying realities beyond comprehension. By contrast, a stricter view insists that only the fleeting present is real, pruning reality to a razor-thin slice of now (at great philosophical cost). A newly proposed middle path tries to reconcile these extremes, granting reality to past and future while refusing to multiply worlds without necessity. In what follows, we compare four influential views of time’s ontology and the temporal vastness they imply: the Block Universe (Eternalism), which treats all times as equally existent in a static “block” of spacetime; the Many-Worlds Interpretation (MWI) of quantum mechanics, which explodes the Block Universe into countless branching timelines for every quantum outcome; Presentism, which asserts that only the present moment exists; and Existential Realism (ER), a recent framework that offers a disciplined middle ground by distinguishing what exists (strictly present entities) from what is real (a broader causal and informational structure including past and future). We will see that each view carries profound ontological implications – from a universe densely populated with dinosaurs and future aliens, to a multiverse of near-infinite extent, to a vanishingly small ontology of just the now. After outlining each theory, we conclude with reflections on the epistemic humility warranted by such extraordinary ontologies, and consider whether a moderate view like ER can capture time’s reality without the ontological excesses of its rivals.

Contemporary Artificial Intelligence and other computational systems—from machine learning models and large language models to autonomous agents and predictive simulations—usually handle time in a tenseless manner, treating past, present, and future data points as uniform elements of a timeline. They lack an explicit ontology of the present (what exists now), becoming (how the present continually updates from potential to actual), and temporal asymmetry (the one-way flow of causality from past to future). This paper proposes that Existential Realism (ER), an ontological framework distinguishing existence (entities in the present moment) from reality (a broader set including causally or informationally relevant past and future entities), can enrich the way technological systems model time. We argue that by incorporating ER’s present-centered, two-tier view of time, machines could become more temporally-aware and responsible in their decision-making. We detail key ER concepts—such as the primacy of the present, the reality of the non-present, truthmaking, and the idea of a real-but-not-yet-existent future—and map them onto machine-level analogues like sensor inputs (the machine’s “existence”), memory traces, simulation states, and predictive models. ER provides a structured approach for machines to: distinguish what exists now from what is merely remembered or anticipated; represent future states as real but not yet existent, enabling ethical foresight; anchor predictions in current data while reasoning about long-term consequences; and avoid temporal fallacies like treating the future as fixed or erasing the influence of the past. Through examples in climate modeling, medical diagnostics, robotics, and Artificial Intelligence ethics, we illustrate how an ER-informed system could better navigate time-sensitive tasks—e.g. by understanding that only the present sensor data is actual, that past data (though no longer existent) remains real evidence, and that future scenarios (though not yet actualized) demand present attention. We also draw on existing literature in philosophy and cognitive science to show that ER’s framework aligns with how humans experience time (through memory and anticipation) and how ethical reasoning already extends reality to future generations. In sum, Technology and the Reality of the Present-Centered Machine outlines an interdisciplinary vision: embedding a philosophically robust, present-centered temporal ontology into our technologies to foster more prudent, transparent, and temporally-grounded intelligent systems.

Existential Realism (ER) is an ontological framework distinguishing existence, confined to the present moment, from reality, which spans past and future entities by virtue of their causal or informational connections to the present. This paper extends ER’s metaphysical insights into the biological and cognitive domains, arguing that living systems—from humans to bacteria—are fundamentally time-bound organisms whose behavior and identity are shaped by temporal structures. Advanced organisms like humans exhibit memory, anticipation, predictive coding, narrative identity formation, mental time travel, temporal binding of events, and decision-making based on past experiences and future possibilities. At the same time, simpler organisms (plants, bacteria, slime molds) demonstrate tropisms, endogenous clocks and rhythms, and responses to temporally structured environments (e.g. day/night cycles, seasonal changes, intermittent stimuli) that function as primitive “models” of time. In all cases, past events that no longer exist continue to influence present behavior through physical traces or learned information, while future events that do not yet exist are nevertheless anticipated and built into current plans and physiological states. These empirically grounded temporal behaviors support ER’s claim that past and future entities are real (via causal effects, structural traces, or inferential links) despite their lack of present existence. By surveying examples from neuroscience (memory engrams, Hebbian plasticity, circadian timing in the brain) and biology (plant stress memory, microbial anticipatory foraging, slime mold learning), we show that temporally extended behavior in organisms depends on internal representations of time. This aligns with ER’s two-tiered ontology: organisms exist only in the present, yet they operate within a wider temporal reality. We conclude with reflections on how ER’s perspective illuminates life as a temporally structured phenomenon, and how an organism’s identity and responsiveness are sculpted by the interplay of past realities and future possibilities.