Ted Parent

It is argued that Quine's oft-made point about modal opacity has a hitherto unappreciated force. It ultimately suggests that Kripke's recursive semantics is not well-defined on de re modal statements, assuming that (e.g.) numbers are not individuated intensionally . (Marcus's system QS4 avoids the issue due to her substitutional quantifiers, although she invokes intensional objects for other reasons). One solution is to restrict substitution in both the object language and the metalanguage, but either the problem repeats in the meta-metalanguage (and so on), or Kripke must relinquish that modal truths represent metaphysical realities, e.g., essences. However, a Kripkean might retort that QML is indispensable to a scientific description of natural language, meaning that Quine is also threatened with an intensional ontology. A programmatic sketch is offered in reply. The ontology of intensional linguistics is accepted as faithful to the ontology of ordinary language, but a Quinean can coherently add that the ontology is mistaken.

Mental fictionalism holds that folk psychology should be regarded as a kind of fiction. The present version gives a Lewisian prefix semantics for mentalistic discourse, where roughly, a mentalistic sentence “p” is true iff “p” is deducible from the folk psychological fiction. An eliminativist version of the view can seem self-refuting, but this charge is neutralized. Yet a different kind of “self-effacing” emerges: Mental fictionalism appears to be a mere “parasite” on a future science of cognition without contributing anything substantial. The paper then rebuts the objection, illustrating that prefix semantics resolves a lingering problem for eliminativism from Boghossian. The problem is that eliminativists seem unable to adopt realism about neuroscience, for such realism implies that neuroscientific statements represent reality accurately. However, a deflationary version of prefix semantics allows the eliminativist to draw an ontologically relevant distinction (roughly) between truths that have a storytelling prefix and those that do not. (Deflationism means there is no implication that the unprefixed sentences robustly represent reality). The overarching lesson is that eliminativists need to approach ontology carefully so as to avoid self-refutation; however, prefix-semantical mental fictionalism provides the resources for them to do so.

Beebee’s (2018) equilibrism argues that methological problems and pervasive disagreement in philosophy suggests that we should not believe any philosophical claims, but at most accept them as working hypotheses. In this, Beebee takes van Fraasseen (1980) as inspiration, whose scientific instrumentalism proposes mere acceptance rather than belief in microphysical theories. In this paper, I suggest that mere acceptance for philosophical claims faces problems that are not incurred by scientific instrumentalism. One issue is that unlike van Fraassen's pragmatic (and somewhat skeptical) stance toward microphysics, Beebee wants mere acceptance of a proposition to still indicate one's sincere "view." I first consider several accounts of how to identify this non-believing attitude, e.g., by a low-ish credence to p, by an utterance of "p" under a fictionalist construal, and by an utterance of "p" under a deflationary construal. The first two still end up invoking philosophical beliefs, whereas the latter ends up radicalizing Beebee's position in an unfortunate way. I conclude that barring a radical kind of deflationism, philosophical belief seems pretty much unavoidable.

Start with an extension of Q (Robinson arithmetic) that internalizes an axiom predicate, and has an axiom that denies axiom-status to a formula using a constant $\alpha$. Then, whether the system is consistent depends on which number is assigned to $\alpha$. Contradiction is provable if $\alpha$ is ``directly'' self-referential as per recent work by Kripke. The contradiction is structurally akin to the liar paradox but arises without the usual semantic or modal vocabulary. Several solutions are noted. Yet it remains that axiomhood exhibits liar-like fragility under naive internalization.

Daniel Dennett's intentional systems theory occupies a middle ground between hyper-realism and eliminativism about belief. Nonetheless, Dennett has resisted being pinned down, describing belief as both real and fictional, abstract yet perhaps neurally real. This paper argues that Dennett’s view is best understood as a version of weak mental fictionalism, where belief attributions are true according to a predictive interpretive framework, without a commitment to concrete representational states. Drawing on Lewisian prefix-semantics and a deflationary theory of meaning, I show how this view preserves Dennett’s commitments to objective patterns and interpretability while avoiding the regress problems posed by Kriegel and Boghossian. The result is a fictionalism that is semantically regimented, ontologically modest, and consonant with Dennett’s broader philosophical temperament. I close by suggesting that this reconstructed view finds its natural home within a quietist metaphilosophical stance.

[Under contract with CUP, in preparation] What is a mind? Is it possible for a computer or other machine to have a mind? And how would we know? Mental fictionalism offers a new approach to these timely questions. Its central idea is that mental states (thoughts, beliefs, desires) are useful fictions. When we talk about mental states, we should be seen as merely speaking “as if” humans (and perhaps other creatures or even artifacts) had such states, in order to make sense of their behavior. This book is unique in presenting and defending three versions of mental fictionalism in a single volume (prefix-semantical mental fictionalism, pretense mental fictionalism, and affective storyism). The authors are three of the world’s most prominent proponents (respectively) of each variety: T. Parent (Nazarbayev University), Adam Toon (University of Exeter), and Tamás Demeter (Corvinus University of Budapest). The book essentially pits these different varieties of mental fictionalism against each other, allowing the reader to size them up. In the process, fresh perspectives are offered on foundational matters in the philosophy of mind, such as the nature of mental states and folk psychology, as well as hot topics such as embodied cognition, animal cognition, consciousness, and AI. UPDATE: The chapter on prefix-semantical mental fictionalism is available upon request; write to nontology "at" gmail.

Sellars (1962) contains some of the most important metaphilosophical reflections from the analytic tradition. He insightfully describes the relationship between philosophy and science, by identifying the philosophical task of integrating the manifest image into the scientific image. But while this description is sound, it is importantly incomplete. Here, I first suggest that a more complete picture shows philosophy in “superposition” in relation to science; philosophy occuplies multiple positions in relation to science, owing to the variegated tasks that philosophers pursue. In the final section, we shall see that our catalogue of philosophical tasks provides means for confronting that obstinate question “How is metaphysics possible?”

We first offer a minimal version of PRA where the subscript on any function symbol f_i allows us to recover the axiom defining the function symbol. An algorithm is then constructed where the relevant subscript guides the generation of a "canonical proof" of f_i(i,n) = m. (Halting occurs when a line is reached with zero occurrences of 'f' to the right of '='.) The resulting algorithm is then shown to satisfy all standard criteria for being p.r. This suggests that the standard diagonal objection does not apply straightforwardly in this setting, despite surface-level compliance with its assumptions. This points to a need for greater clarity about these assumptions.

This paper begins with a problem stemming from Hume regarding credences about credences. Suppose one has a credence of .95 in p, and suppose one assesses the credence to be such. But suppose one’s second-order credence in this assessment is less than 1. Then, by a standard conditionalization rule, one’s credence in p becomes less than .95. Moreover, such “erosion” can iterate by considering one’s, third-, fourth-, fifth-order credences, etc. (In light of this, some have rejected higher-order credences; however, it is argued that Lewis’ “Principal Principle” forbids this.) The paper then offers a partial solution by describing circumstances under which a person has reason to assign credence 1 to a first-order credence. The solution takes the form of a “transparency” view of self-knowledge from Parent (2017, chapter 8). Briefly, it is argued that when one “reflex-like” utters a sentence “The probability of p is n”, then as a matter of psychological law, the utterance is an expression of one’s own judgment. The Principal Principle then necessitates that one’s credence in p is n, assuming one is being rational. Thus, upon perceiving such an utterance, one can thereby have a reason to assign a second-order credence of 1.

Can God create an unliftable stone? Beall & Cotnoir propose that ‘God can create an unliftable stone’ is a truth-value gap (neither true nor false). However, this yields a revenge paradox on whether God can eschew gaps. Can God avoid gappy ascriptions of power? Either way, God’s power seems to have limits. In response, it may be said that ascribing God the power to avoid gaps is itself gappy—it concerns a power that God neither has nor lacks. Yet this ends up being inconsistent, for it implies that God definitely lacks that power. Following Aquinas, perhaps Beall & Cotnoir could accept this lack and still uphold omnipotence, suggesting that the power to avoid gaps is impossible for God. Yet the Aquinian stratagem is enough to block the original paradox, which saps the motivation to proffer truth-value gaps in addition. I conclude that the gappy solution is either inadequate or insufficiently motivated.

Jc Beall is known for defending modest dialetheism; this is the view that there are dialetheia, but only in the form of “spandrels” arising from otherwise reasonable semantic terminology (e.g., the Liar paradox). Beall also regards his view as modest in partaking of a deflationary view of truth, a view where ‘true’ is a device of disquotational inference which expresses no “substantive property.” Beall supports deflationism by an appeal to Ockham’s razor; however, the premise that ‘true’ is fundamentally disquotational is found dubious. Nonetheless, we can craft an ultra-modest dialetheism which assumes only that at least one utterance of ‘This sentence is not true’ uses ‘true’ as a disquotational device, and maintains neturality on whether it expresses a substantive property. The limited scope of the ultra-modest view will be disappointing to formal semanticists hoping to capture the behavior of ‘true’ throughout the language. But its modest basis gives dialetheism the best hope for wider acceptance in the discipline.

Some contemporary philosophers suggest that we know just by introspection that folk psychological states exist. However, such an "armchair refutation" of eliminativism seems too easy. I first attack two strategems, inspired by Descartes, on how such a refutation might proceed. However, I concede that the Cartesian intuition that we have direct knowledge of representational states is very powerful. The rest of this paper then offers an error theory of how that intuition might really be mistaken. The idea is that introspection does not detect any folk psychological states, but rather detects neural states that dispose us to certain sorts of linguistic behavior. Briefly, rather than detecting a mental appearance of the state-of-affairs that I am sitting near the fire, introspection detects a state disposing me to assert "It appears to me that I am sitting by the fire." The nature of this linguistic-dispositional state is then given a connectionist underpinning, where inputs from introspection lead to such assertive behavior. The Cartesian certainty we feel in self-ascribing such appearances is also explained. Even though I do not endorse such an error theory outright, I suggest that its tenability is enough to undercut introspection arguments against eliminativism.

This chapter introduces several versions of mental fictionalism, along with the main lines of objection and reply. It begins by considering the debate between eliminative materialism (“eliminativism”) versus realism about mental states as conceived in “folk psychology” (i.e., beliefs, desires, intentions, etc.). Mental fictionalism offers a way to transcend the debate by allowing talk of mental states without a commitment to realism. The idea is to treat folk psychology as a “story” and three different elaborations of this are reviewed. First, prefix semantics paraphrases a sentence like ‘Biden believes that Trump lost’ as ‘According to folk psychology, Biden believes that Trump lost’, whereby ontological commitment to belief is avoided. Similarly, pretense theory suggests that we do not assert ‘Biden believes that Trump lost’, but only pretend to assert it. Third, affective theory proposes that such discourse is used in a metaphorical way to understand a person’s affective and dispositional states vis-a-vis the community. The main objections concern whether folk psychology has the features of storytelling, and whether mental fictionalism ends up being self-refuting. The chapter also recaps a less discussed fictionalist view about “qualia” or phenomenal states, and closes by summarizing the papers contained in the volume.

Mental fictionalism holds that folk psychology should be regarded as a kind of fiction. The present version gives a Lewisian prefix semantics for mentalistic discourse, where roughly, a mentalistic sentence “p” is true iff “p” is deducible from the folk psychological fiction. An eliminativist version of the view can seem self-refuting, but this charge is neutralized. Yet a different kind of “self-effacing” emerges: Mental fictionalism appears to be a mere “parasite” on a future science of cognition, without contributing anything substantial. The paper then rebuts the objection, illustrating that prefix semantics resolves a lingering problem for eliminativism from Boghossian. The problem is that eliminativists seem unable to adopt realism about neuroscience, for such realism implies that neuroscientific statements *represent* reality accurately. However, a deflationary version of prefix semantics allows the eliminativist to draw an ontologically relevant distinction (roughly) between truths that have a story-telling prefix and those that do not. (Deflationism means there is no implication that the unprefixed sentences robustly represent reality.) The overarching lesson is that eliminativists need to approach to ontology carefully so to avoid self-refutation; however, prefix semantical mental fictionalism provides the resources for them to do so.

[For a planned Festschrift on William Lycan, edited by Mitch Green and Jan Michel.] Lycan (2022) sums up his (2019) _On Evidence in Philosophy_ as a “dolorous” book. This is primarily because the book claims that the field is infected with non-rational socio-psychological forces (fashion, bias, etc.) and that there is a persistent lack of consensus on philosophical questions. In this paper, I primarily rebut Lycan's second reason for dolorousness. For one, if we attend carefully to his text, his metaphilosophical despair seems to die a death of 1000 qualifications. For another, several of the most important qualifications to such pessimism have been omitted. In attending to these, we shall see that philosophy has much to be proud of. I also offer an explanation for why many optimistic signs for philosophical progress tend to escape our notice.

What are mental states? When we talk about people’s beliefs or desires, are we talking about what is happening inside their heads? If so, might cognitive science show that we are wrong? Might it turn out that mental states do not exist? Mental fictionalism offers a new approach to these longstanding questions about the mind. Its core idea is that mental states are useful fictions. When we talk about mental states, we are not formulating hypotheses about people’s inner machinery. Instead, we simply talk "as if" people had certain inner states, such as beliefs or desires, in order to make sense of their behaviour. This is the first book dedicated to exploring mental fictionalism. Featuring contributions from established authors as well as up-and-coming scholars in this burgeoning field, the book reveals the exciting potential of a fictionalist approach to the mind, as well as the challenges it faces. In doing so, it offers a fresh perspective on foundational debates in the philosophy of mind, such as the nature of mental states and folk psychology, as well as hot topics in the field, such as embodied cognition and mental representation. Mental Fictionalism: Philosophical Explorations essential reading for advanced undergraduates, postgraduates and professionals alike.

The Cartesian thinking self may seem indisputably real. But if it is real, then so thinking, which would undercut mental fictionalism. Thus, in defense of mental fictionalism, this paper argues for fictionalism about the thinking self. In short form, the argument is: (1) If I exist outside of fiction, then I am identical to (some part of/) this biomass [= my body]. (2) If I die at t, I cease to exist at t. (3) If I die at t, no part of this biomass ceases to exist at t. (4) Therefore, no part of this biomass is identical to me. [From (2), (3)] (5) Therefore, I do not exist outside of fiction. [From (4), (1)] One reply to the argument is that the self is an aggregate of electricity in the brain which disperses upon death. The rejoinder is that this, at best, describes the thoughts realized in the brain, and not the subject who thinks the thoughts. A second objection stresses the undeniable sense that the thinking self has a location. In reply, the extended thought-experiment from Dennett’s “Where Am I?” is used to show that the sense of self-location may well be illusory.

This is a contribution to a symposium on Annalisa Coliva's book _The Varieties of Self-Knowledge_. I present her notion of a "commitment" and how it is used in her treatment of Moore paradoxical assertions and thoughts (e.g., "I believe that it is raining, but it is not;" "It is raining but I do not believe that it is"). The final section notes the points of convergence between her constitutivism about self-knowledge of commitments, and the constitutivism from my book _Self-Reflection for the Opaque Mind_.

It is a consequence of Quine’s confirmation holism that the logical laws are in principle revisable. Some have worried this is at odds with another dictum in Quine, viz., that any translation which construes speakers as systematically illogical is ipso facto inadequate. In this paper, I try to formulate exactly what the problem is here, and offer a solution to it by (1) disambiguating the term ‘logic,’ and (2) appealing to a Quinean understanding of ‘necessity.’ The result is that the different theses in Quine’s philosophy of logic are to be situated within different contexts of inquiry.

[Draft of October 2024] David Lewis acclimated us to talk of “nonactual concreta that exist,” regarding talking donkeys and the like. I shall argue that this was not for the best, and try to normalize a way of describing them as “actual concreta that do not exist.” The basis of this is a defense of the Meinongian thesis “there are objects of which it is true that there are no such objects,” re: fictitious and illusory objects. I first formulate the problem of negative existentials in a novel way, and discuss why this new version is more forceful against anti-Meinongians. Additional data is also pressed against anti-Meinongians--e.g., the truth of ‘Pegasus is imaginary’, and a reading of ‘There actually are illusory objects’ where it comes out true. The Meinongian, in contrast, easily and uniformly explains the same data, by allowing the existence Pegasus, pink elephants, and the like. But contra Meinong, these cases suggest that the nonexistent objects are mind-dependent objects, and I clarify and defend this suggestion from several objections. The resulting Meinongianism is thus “conservative” in that it merely acknowledges the sense in which there are mind-dependent objects, imaginary and illusory objects being prime examples. Of special note, the “ideology” is conservative as well in that the typical Meinongian jargon of “nuclear” or “encoded” properties is paraphrased away. New suggestions about the ontology of abstracta, mere possibilia, and impossibilia are sketched in light of this. Comparisons are also made with Crane and McGinn, among others.

Oppenheimer & Zalta have re-formulated their non-modal version of the ontological argument, with the help of PROVER9, an automated reasoning engine. The authors end up rejecting the new argument; however, the theist has a rejoinder worth considering. But after presenting the rejoinder, I highlight that the conceivability of the being does not imply its possibility. One lesson is that even non-modal ontological arguments must engage modal matters concerning God. Another lesson is that if PROVER9 is able to derive a conclusion from fewer premises, the proof is sometimes inferior as an argument.

Externalism holds that the content of our utterances and thoughts are determined partly by the environment. Here, I offer an argument which suggests that externalism is incompatible with a natural view about ontological commitment--namely, the Quinean view that such commitments are fixed by the range of the variables in your theory. The idea in brief is that if Oscar mistakenly believes that water = XYZ, the externalist ontologically commits Oscar to two waterish kinds, whereas the Quinean commits him to one such kind (albeit a metaphysically impossible kind). The penultimate section addresses a variety of objections to the argument.