Ioannis G. Ntagkas

(From the book cover in 2007) The Blackwell Companion to Consciousness is the most thorough and comprehensive survey of contemporary scientific research and philosophical thought on consciousness currently available. Its 55 newly commissioned, peer-reviewed chapters combine state-of-the-art surveys with cutting edge research. Taken as a whole, these essays by leading lights in the philosophy and science of consciousness create an engaging dialog and unparalleled source of information regarding this most fascinating and mysterious subject.

A timely volume that uses science fiction as a springboard to meaningful philosophical discussions, especially at points of contact between science fiction and new scientific developments. Raises questions and examines timely themes concerning the nature of the mind, time travel, artificial intelligence, neural enhancement, free will, the nature of persons, transhumanism, virtual reality, and neuroethics Draws on a broad range of books, films and television series, including _The Matrix, Star Trek, Blade Runner, Frankenstein, Brave New World, The Time Machine,_ and _Back to the Future_ Considers the classic philosophical puzzles that appeal to the general reader, while also exploring new topics of interest to the more seasoned academic.

Among epistemologists, it is common to assume that insofar as coherence bears on the justification of belief, the only relevant coherence relations are those _within_ an individual subject’s web of beliefs. After clarifying this view and exploring some plausible motivations for it, we argue that this individualistic account of the epistemic relevance of coherence fails to account for central facets of scientific practice. In its place we propose a social account of coherence. According to the view we propose, a scientist _S_’s belief that _p_ is _prima facie_ unjustified if this belief negatively coheres with justified scientific claims in her scientific community. This account of coherence yields an epistemology for scientific belief which, we argue, has all of the benefits and none of the liabilities of its more individualistic predecessor.

The coherence of independent reports provides a strong reason to believe that the reports are true. This plausible claim has come under attack from recent work in Bayesian epistemology. This work shows that, under certain probabilistic conditions, coherence cannot increase the probability of the target claim. These theorems are taken to demonstrate that epistemic coherentism is untenable. To date no one has investigated how these results bear on different conceptions of coherence. I investigate this situation using Thagard’s ECHO model of explanatory coherence. Thagard’s ECHO model provides a natural representation of the evidential significance of multiple independent reports.

I propose a way to accommodate plausible examples of cyclic grounding chains that have been proposed in the literature while preserving a good measure of the metaphysical foundationalist’s grounding hierarchy with a foundational level. This precludes the need to adopt a strong form of coherentism, such as the view that everything grounds everything, or even the view that everything grounds everything other than itself. I do this by developing axiomatizations of grounding which allow for localized cycles of ground at the non-foundational and foundational levels, but which still place certain foundationalism-like constraints on the grounds that grounded facts must have. In addition, I point to considerations, previously put forth in favor of foundationalism and a strong form of coherentism, that also help support the views I develop.

This chapter explores global debunking arguments, debunking arguments that aim to give one a global defeater. I defend Alvin Plantinga’s view that global defeaters are possible and, once gained, are impossible to escape by reasoning. They thereby must be extinguished by other means: epistemically propitious actions, luck, or grace. I then distinguish between three types of global defeater—pure-undercutters, undercutters-because-rebutters, and undercutters-while-rebutters—and systematically consider how one can deflect such defeaters. Lastly, since I draw insights from the literature on perhaps the most widely discussed global debunking argument in the literature, Plantinga’s evolutionary argument against naturalism, I end up responding to many potential problems for it. This includes the so-called conditionalization problem, as well as those raised by Bergmann (2002), Law (2012), Deem (2018), Hendricks and Anderson (2020), and Wielenberg (in Craig and Wielenberg (2021)).

Disagreement and debunking arguments threaten religious belief. In this paper, I draw attention to two types of propositions and show how they reveal new ways to respond to debunking arguments and disagreement. The first type of proposition is the epistemically self-promoting proposition, which, when justifiedly believed, gives one a reason to think that one reliably believes it. Such a proposition plays a key role in my argument that some religious believers can permissibly wield an epistemically circular argument in response to certain debunking arguments. The second type of proposition is the epistemically others-demoting proposition, which, when justifiedly believed, gives one a reason to think that others are unreliable with respect to it. Such a proposition plays a key role in my argument that some religious believers can permissibly wield a question-begging argument to respond to certain types of disagreement.

We seem to ascribe mental states and agency to groups. We say ‘Google knows such-and-such,’ or ‘Amazon intends to do such-and-such.’ This observation of ordinary parlance also found its way into philosophical accounts of social groups and collective intentionality. However, these discussions are usually quiet about how groups self-ascribe their own beliefs and intentions. Apple might explain to its shareholders that it intends to bring a new iPhone to the market next year. But how does Apple know what it intends? How do groups get to know their own mental states? This is the question of collective self-knowledge. I argue that collective self-knowledge is a distinct phenomenon that deserves our attention. In particular I suggest: that we should be interested in collective self-knowledge, because our behaviour indicates that we already engage with collective self-knowledge in practice; that groups can collectively avow, which indicates that they have privileged and peculiar access to their own intentional states; and that collective self-knowledge is not reducible to intentional states of individuals and therefore is an independent explanandum.

Philosophers tend to be pretty impressed by human self-knowledge. Descartes (1641/1984) thought our knowledge of our own stream of experience was the secure and indubitable foundation upon which to build our knowledge of the rest of the world. Hume – who was capable of being skeptical about almost anything – said that the only existences we can be certain of are our own sensory and imagistic experiences (1739/1978, p. 212). Perhaps the most prominent writer on self-knowledge in contemporary philosophy is Sydney Shoemaker. The central aim of much of his work has been to show that certain sorts of error are impossible (1963, 1988, 1994). David Chalmers has likewise attempted to show that, for a suitably constrained class of beliefs about one’s own consciousness, error is impossible (2003, sec. 4.1). Even philosophers most of the community thinks of as pessimistic about self-knowledge of consciousness seem to me, really, to be fairly optimistic. Paul Churchland, famous for his disdain of ordinary people’s knowledge about the mind, compares the accuracy of introspection to the accuracy of sense perception – pretty good, presumably, about medium-sized, nearby matters (1985, 1988). Dan Dennett, often cited as a pessimist about introspective report, actually says that we can come close to infallibility when charitably interpreted (2002). The above references concern knowledge of the stream of conscious experience, but philosophers have also tended to be impressed with our self-knowledge of our attitudes, such as our beliefs and desires. Consider this: Although I can be wrong about its being sunny outside, I can’t in the same way be wrong, it seems, about the fact that I think it’s sunny outside. Some..

Borges’ The Circular Ruins tells the story of a magician who turns out to be a character in a dream. Leibowitz (2021) argues that this scenario undermines the rational indubitability of Descartes’ Cogito. The magician, he argues, is an unreal appearance and therefore does not exist. I argue that Borges drew a distinction between reality and existence and that he was right to do so. There are various senses of reality and the sense in which a dreamt character is unreal poses no threat to their existence or to the indubitability of the Cogito. The magician is unreal because he is a mind-dependent, illusory and fake. Nonetheless, he can be certain that he thinks, therefore he is.

Most promising responses to skepticism fall into “Moorean” or “rationalist” camps. Mooreans believe that some apparently circular forms of reasoning allow us to have justification to believe that skeptical hypotheses are false. Rationalists believe that we have a priori justification to believe that skeptical hypotheses are false. It can seem that anti-skeptics are stuck choosing between fishy circular reasoning and mysterious a priori justification. I present a new difficulty for rationalism by focusing on skeptical scenarios wherein our faculties of a priori reasoning are untrustworthy. In dealing with these scenarios, rationalists end up having to embrace the same sorts of circular reasoning that Mooreans use to deal with more familiar skeptical scenarios. As a result, there is no viable diagnosis of what's wrong with Moorean reasoning that does not also apply to rationalism: both anti-skeptical approaches are in the same boat when it comes to embracing circular reasoning

This thesis has three parts. In the first part, the author defends the coherence of Cartesian scepticism about the external world. In particular, the author contends that such scepticism survives attacks from Descartes himself, as well as from W.V.O. Quine, Robert Nozick, Alvin Goldman, and David Armstrong. It follows that Cartesian scepticism remains intact. In the second part of this thesis, the author contends that the semantic or content externalisms of Hilary Putnam and Tyler Burge do not refute Cartesian scepticism about the external world. In particular, he argues that Putnam and Burge do not make good their respective externalist cases against scepticism, and that they beg the question against that position. The author concludes that semantic or content externalism is important against such scepticism. In the third part of this thesis, the author addresses the mind, and suggests that Descartes, by offering his cogito argument, also offers a theory of thought content, which he then supports with his substance dualism. He suggests that Descartes does not succeed with any of his arguments here, although his theory of thought content is still plausible. To remedy this, the author discusses the versions of narrow meaning or content offered by Jerry Fodor and Colin McGinn, and defends a version of such meaning or content that presupposes that semantic or content externalism is false. The author lastly follows Donald Davidson, and argues for a version anomalous monism, which he contends is a theory that shows how semantic or content internalism might be true.

Earl Conee and Richard Feldman have recently argued that the evidential support relation should be understood in terms of explanatory coherence: roughly, one's evidence supports a proposition if and only if that proposition is part of the best available explanation of the evidence. Their thesis has been criticized through alleged counterexamples, perhaps the most important of which are cases where a subject has a justified belief about the future. Kevin McCain has defended the thesis against Byerly's counterexample. I argue that McCain's defense is inadequate before pointing toward a more promising solution for explanationism. The Byerly–McCain exchange is important because it casts light on the difficult issues of the standards for justification and the nature of epistemic support. Furthermore, McCain's defense of explanationism about epistemic support represents an important recent development of the burgeoning explanationist program in epistemology and philosophy of science

The present review of literature surveys two main issues related to self-referential processes: (1) Where in the brain are these processes located, and do they correlate with brain areas uniquely specialized in self-processing? (2) What are the empirical and theoretical links between inner speech and self-awareness? Although initial neuroimaging attempts tended to favor a right hemispheric view of selfawareness, more recent work shows that the brain areas which support self-related processes are located in both hemispheres and are not uniquely activated during self-reflective tasks. Furthermore, self-awareness at least partially relies on internal speech. An activation of Broca's area (which is known to sustain inner speech) is observed in a significant number of brain-imaging studies of self-reflection. Loss of inner speech following brain damage produces self-awareness deficits. Inner speech most likely can internally reproduce social mechanisms leading to self-awareness. Also, the process of self-reflection can be seen as being a problem-solving task, and self-talk as being a cognitive tool the individual uses to effectively work on the task. It is noted that although a large body of knowledge already exists on self-awareness, little is known about individual differences in dispositional self-focus and types of self-attention (e.g., rumination vs. self-reflection)

Self-awareness represents the capacity of becoming the object of one’s own attention. In this state one actively identifies, processes, and stores information about the self. This paper surveys the self-awareness literature by emphasizing definition issues, measurement techniques, effects and functions of self-attention, and antecedents of self-awareness. Key self-related concepts (e.g., minimal, reflective consciousness) are distinguished from the central notion of self-awareness. Reviewed measures include questionnaires, implicit tasks, and self-recognition. Main effects and functions of self-attention consist in selfevaluation, escape from the self, amplification of one's subjective experience, increased self-knowledge, self-regulation, and inferences about others' mental states (Theory-of-Mind). A neurocognitive and socioecological model of self-awareness is described in which the role of face-to-face interactions, reflected appraisals, mirrors, media, inner speech, imagery, autobiographical knowledge, and neurological structures is underlined

Did Descartes manage to overcome the skeptics? If we understand “overcome” in the sense of “refute,” the answer is no, since his hyperbolic doubt harbors several blind spots and is, therefore, not as radical as is commonly argued. In this way, the victory of the cogito is perhaps less decisive and fruitful than it is claimed. If we understand “overcome” in the sense of “remove” or “move beyond,” the answer is yes. Descartes has overcome skepticism, but at the cost of a decision, a sort of bet made in favor of reason based on a confidence in the human mind that is never really subverted. This faith in reason, truth, and specific epistemological principles in Descartes’ philosophy constitute what Wittgenstein calls “hinges,” which are indispensable for doubting and searching for truth. In this sense, Descartes’ anti-skepticism is more a confidence in reason in order to save the possibility of science than the result of a logical refutation.

Descartes is traditionally accused of reasoning circularly in the _Meditations. Yet, it seems clear that there is no formal or logical circularity in his reasoning. There is another kind of circularity that William Alston calls epistemic circularity, and Descartes's reasoning seems to be circular in this sense. The question is whether this makes his reasoning viciously circular. It is argued that it does if we assume that his aim was to resolve the ancient Pyrrhonian problematic. Because of epistemic circularity, the problematic cannot be resolved by his project

Three kinds of things may be creative: persons, processes, and products. The standard definition of creativity, used nearly by consensus in psychological research, focuses specifically on products and says that a product is creative if and only if it is new and valuable. We argue that at least one further condition is necessary for a product to be creative: it must have been produced by the right kind of process. We argue furthermore that this point has an interesting epistemological implication: when you judge a product to be creative--attributing creativity--you are not just judging it to be new and valuable. Even if you did not witness how it was produced, you are also making a judgement about how it was produced.

Debates in Modern Philosophy: Essential Readings and Contemporary Responses provides an in-depth, engaging introduction to important issues in modern philosophy. It presents 13 key interpretive debates to students, and ranges in coverage from Descartes' Meditations to Kant's Critique of Pure Reason. -/- Debates include: -/- Did Descartes have a developed and consistent view about how the mind interacts with the body? Was Leibniz an idealist, or did he believe in corporeal substances? What is Locke's theory of personal identity? Could there be a Berkeleian metaphysics without God? Did Hume believe in causal powers? What is Kant's transcendental idealism? -/- Each of the thirteen debates consists of a well known article or book chapter from a living philosopher, followed by a new response from a different scholar, specially commissioned for this volume. Every debate is prefaced by an introduction written for those coming upon the debates for the first time and followed by an annotated list for further reading. The volume starts with an introduction that explains the importance and relevance of the modern period and its key debates to philosophy and ends with a glossary that covers terms from both the modern period and the study of the history of philosophy in general. -/- Debates in Modern Philosophy will help students evaluate different interpretations of key texts from modern philosophy, and provide a model for constructing their own positions in these debates.

The dissertation examines the nature and epistemic implications of epistemic source circularity. An argument exhibits this type of circularity when at least one of the premises is produced by a belief source the conclusion says is legitimate, e.g. a track record argument for the legitimacy of sense perception that uses premises produced by sense perception. In chapter one I examine this and several other types of circularity, identifying relevant similarities and differences between them. In chapter two I discuss the differences between internalist and externalist analyses of justification. I examine in detail foundationalist and non-foundationalist versions of internalism, and go on to consider how one might characterize externalism: either negatively, by denying particular internalist theses, or positively, in terms of a theory offering different conditions for justification. I discuss the views of reliabilist foundationalists at length. In chapter three I present the internalist objection to externalism that the latter mistakenly permit one to be justified in believing the conclusion of an epistemic source circular inference. I explain the externalists' response that it is not in virtue of their externalism that they permit epistemic source circularity but rather their foundationalism; thus, internalist foundationalists must permit epistemic source circularity as well. I evaluate the positions of several internalists, most of them explicitly foundationalists, and argue that they too cannot avoid permitting epistemic source circularity. In the final chapter I consider whether such circularity is vicious, even though both internalist and externalist foundationalists permit it. I argue that one can sustain an objection to epistemic source circularity by imposing a non-question-begging requirement on justification and explain how respecting this requirement leads one to a non-foundationalist view. I conclude by considering the objection that question-begging leads to a certain arbitrariness in belief formation that should give the foundationalist pause when it comes to determining, at the beginning of inquiry, which beliefs are justified and which are not. The dissertation is primarily concerned with making clear the possible skeptical and non-skeptical positions one can take towards epistemic source circularity. I do not argue for the truth of a particular metaepistemology.

Much ado has been made regarding Descartes's understanding of the creation of what he called the "eternal truths" because he described them, paradoxically, as both the free creations of God, and necessary. While there are many varying interpretations of Cartesian modality, the issue has heretofore been treated in a vacuum, as a niche issue having little import beyond being an interesting puzzle for Descartes Scholars. I argue that this treatment is misguided, and that in order to properly understand Cartesian philosophy at all, one must properly understand Descartes's theory of modality. This, however, is no small feat; in order to understand Descartes's seemingly peculiar view on modality, one must first make sense of what Descartes understood the nature of God to be. One reason for this, I argue, is the systematic nature of Cartesian philosophy; indeed when dealing with a dense inter-connection of philosophical issues, one must move from what is more known in itself to what is more known to us, and not the other way around. I argue that in the literature on Cartesian modality, insufficient attention has been paid to the influence of the French School of Spirituality on the Cartesian notion of the divine. I argue that this influence pushed Descartes to criticize traditional attempts to split the horns of Plato's Euthyphro dilemma as violating a proper understanding of the doctrine of divine simplicity. Descartes's commitment to a radical form of the doctrine of divine simplicity leads him to a version of divine voluntarism wherein all `things' depend on God for their existence, and God cannot have had antecedent reason to prefer the creation of anything over anything else. There is little doubt that Descartes embraced the voluntarist horn of the Euthyphro dilemma, but just what that means for Cartesian modality and philosophy generally remains a contentious issue. I argue that Descartes is best read as what I call an `agnostic quietist' regarding God given textual, historical, and systematic considerations. One virtue of an agnostic quietist reading is that I am able to square the passages where Descartes discusses the inconceivability of God's power with the conclusions reached regarding God's non-deceiving nature in the Meditations and elsewhere. Further virtues that I explore are the effects that a quietist reading has on the Cartesian scientific programme, the infamous mind-body problem, Descartes's seemingly inconsistent view regarding human free-will and Descartes's refusal to engage in "theology." Traditionally, Cartesian epistemology has been understood to be a purely a priori undertaking, which succumbs to deep and insurmountable problems. One of the greatest problems facing the Cartesian was the move from the mind to the world. Simon Blackburn, for example, says of the Cartesian epistemological project in the Meditations that Descartes "has put himself on a desert island from which there is no escape." This view is echoed by, and even motivates some of the contemporary views concerning Cartesian modality. I argue, however, that a proper understanding of the Cartesian doctrine of clear and distinct ideas circumvents this famous problem. By highlighting the proper understanding and application of the doctrine of clear and distinct ideas, I show that such ideas not only guarantee the existence of an external truth-maker, but also that such ideas do not do much more than show that there is a truth-maker. I argue that in instances of clear and distinct perception, the truth of the idea is normatively certain, but what makes it true is yet to be established. In this way, clear and distinct ideas are both powerful, in terms of guaranteeing truth, and relatively unhelpful, in that further work is required in order to determine to what the ideas conform. I argue that this is the case not only for actual truths, but for some clearly intuited truths about possibility. As an illustration of my overall thesis, I address the Cartesian argument for the separability of mind and body, and entertain the various interpretations of Descartes's view of human freedom. I argue that in order to understand Cartesian views on either of these issues, one must first make sense of his modal commitments. In both of these cases Descartes claims that finite minds can know that something is possible, even though what makes it possible is well beyond what they can understand.

THIS PAPER PRESENTS THE INTERPRETATION OF DESCARTES'S "COGITO" IN MY BOOK "COGITATIONS" IN A CONCISE AND SLIGHTLY EXTENDED FORM. THE EMPHASIS IS ON CONVEYING THE ESSENTIALS OF THE ARGUMENT THAT "COGITO ERGO SUM" IS AN ANALYTIC ENTAILMENT, BUT I HAVE TAKEN THE OPPORTUNITY TO IMPROVE MY ARGUMENT IN A FEW SMALL WAYS AND TO RELATE THE EXPLICIT FORM OF THE "COGITO" TO SIMILAR REASONING IN DESCARTES'S "SECOND MEDITATION". MY PRIMARY AIM IS TO EXPLAIN HOW THE "COGITO" CAN BOTH BE THE SIMPLE INFERENCE WE FIND IN DESCARTES'S OWN PRESENTATIONS AND YET BE FORMALLY VALID AS IT STANDS