The conceivability argument against physicalism1 starts from the prem- ises that: It is conceivable that I have a zombie-twin, i.e., that there is someone who is physically identical to me and yet who lacks phenomenal con- sciousness; and If it is conceivable that I have a zombie-twin, then it is possible that I have a zombie-twin. These premises entail that physicalism is false, for physicalism is the claim—or can be assumed for our purposes to be the claim2—that.

This paper advances the thesis that we can justifiably believe philosophically interesting possibility statements. The first part of the paper critically discusses van Inwagens skeptical arguments while at the same time laying some of the foundation for a positive view. The second part of the paper advances a view of conceivability in terms of imaginability, where imaginging can be propositional, pictorial, or a combination of the two, and argues that conceivability can, and often does, provide us with justified (...) beliefs of what is metaphysically possible. The notion of scenarios is developed, as is an account of how filling out scenarios can uncover a defeater or, in many cases, strengthen the justification for the relevant possibility statement. (shrink)

Materialism in the philosophy of mind is the thesis that the ultimate nature of the mind is physical; there is no sharp discontinuity in nature between the mental and the non-mental. Anti-materialists asser t that, on the contrary, mental phenomena are different in kind from physical phenomena. Among the weapons in the arsenal of anti-materialists, one of the most potent has been the conceivability argument. When I conceive of the mental, it seems utterly unlike the physical. Anti-materialists insist that (...) from this intuitive difference we can infer a genuine meta-physical difference. Materialists retor t that the nature of reality, including the ultimate natures of its constituents, is a matter for discovery; an objective fact that cannot be discerned a priori. In this paper I under take to provide an explicit analysis of the dialectic that surrounds the conceivability argument. My principal conclusion is that the materialist is right in resisting the reasoning that star ts from considerations of what is conceivable and ends with genuine metaphysical conclusions. However my approach is much more sympathetic to the anti-materialist position than is the standard materialist line, and I will provide a limited defense of some crucial aspects of the anti-materialist position. Materialism will emerge from this fight intact, but shaken. (shrink)

David Chalmers' conceivability argument against physicalism relies on the entailment from a priori conceivability to metaphysical possibility. The a posteriori physicalist rejects this premise, but is consequently committed to psychophysical strong necessities. These don't fit into the Kripkean model of the necessary a posteriori, and they are therefore, according to Chalmers, problematic. But given semantic assumptions that are essential to the conceivability argument, there is reason to believe in microphysical strong necessities. This means that some of Chalmers' (...) criticism is unwarranted, and the rest equally afflicts the dualist. Moreover, given that these assumptions are independently plausible, there's a general case to be made for the existence of strong necessities outside the psychophysical domain. (shrink)

The capacity to represent things to ourselves as possible plays a crucial role both in everyday thinking and in philosophical reasoning; this volume offers much-needed philosophical illumination of conceivability, possibility, and the relations between them.

The Humean view that conceivability entails possibility can be criticized via input from cognitive psychology. A mainstream view here has it that there are two candidate codings for mental representations (one of them being, according to some, reducible to the other): the linguistic and the pictorial, the difference between the two consisting in the degree of arbitrariness of the representation relation. If the conceivability of P at issue for Humeans involves the having of a linguistic mental representation, then (...) it is easy to show that we can conceive the impossible, for impossibilities can be represented by meaningful bits of language. If the conceivability of P amounts to the pictorial imaginability of a situation verifying P, then the question is whether the imagination at issue works purely qualitatively, that is, only by phenomenological resemblance with the imagined scenario. If so, the range of situations imaginable in this way is too limited to have a significant role in modal epistemology. If not, imagination will involve some arbitrary labeling component, which turns out to be sufficient for imagining the impossible. And if the relevant imagination is neither linguistic nor pictorial, Humeans will appear to resort to some representational magic, until they come up with a theory of a ‘third code’ for mental representations. (shrink)

Conceived in Liberty is a cultural, sociological and geopolitical review of the uniquely American notion that the country and its people are "exceptional." While all nations have their own patriotic commitments, no other people have outwardly declared their power as vigorously as have Americans, especially since World War II. John J. Tierney, Jr. advances the idea that liberty is the singular source of the power of the American worldview and all other elements of this society--equality, patience, charity, justice, etc.--are derived (...) from liberty. He argues that this worldview comes from this one source and is responsible for the many movements that may engage the public's interest, such as women's rights, civil rights, and voting rights. Such movements are all positive, but they could not exist in a society devoid of liberty. Conceived in Liberty also traces other main components of the American worldview: geographic expanse, immigration, energy of the populace, diversity, public policies, and the elements that contribute to exceptionalism. Tierney is not blind to some of the deficiencies of the United States, but he posits that the liberty it manifests is truly the political globe's last, best hope. (shrink)

There is a long tradition in philosophy of using a priori methods to draw conclusions about what is possible and what is necessary, and often in turn to draw conclusions about matters of substantive metaphysics. Arguments like this typically have three steps: first an epistemic claim , from there to a modal claim , and from there to a metaphysical claim.

Christopher Hill contends that the metaphysical modalities can be reductively explained in terms of the subjunctive conditional and that this reductive explanation yields two tests for determining the metaphysical modality of a proposition. He goes on to argue that his reductive account of the metaphysical modalities in conjunction with his account of modal knowledge underwrites the further conclusion that conceivability does not provide a reliable test for metaphysical possibility. I argue (1) that Hill’s reductive explanation of the metaphysical modalities (...) in terms of the subjunctive conditional does not yield a reductive explanation of knowledge of metaphysical modality in terms of knowledge of subjunctive conditionals, and (2) that his account of modal knowledge is at odds with his contention that conceivability does not provide epistemic access to metaphysical possibility. (shrink)

This paper was chosen by The Philosopher’s Annual as one of the ten best articles appearing in print in 2000. Reprinted in Volume XXIII of The Philosopher’s Annual. In his very influential book David Chalmers argues that if physicalism is true then every positive truth is a priori entailed by the full physical description – this is called “the a priori entailment thesis – but ascriptions of phenomenal consciousness are not so entailed and he concludes that Physicalism is false. As (...) he puts it, “zombies” are metaphysically possible. I attempt to show that this argument is refuted by considering an analogous argument in the mouth of a zombie. The conclusion of this argument is false so one of the premises is false. I argue at length that this shows that the original conceivability argument also has a false premise and so is invalid. (shrink)

The starting point of this paper is an argument to the conclusion that the definition of metaphysical possibility in terms of correct conceivability, conceivability informed by knowledge of relevant essences, found in Rosen (2006) is equivalent to a version of the essentialist definition of metaphysical necessity. This argument appears to show that correct conceivability is a notion of conceivability by name only and is therefore of no interest to epistemologists of modality. In this paper, I present (...) the equivalence argument, explain the idealizing assumptions involved in it and sketch a version of the conceivability approach which weakens these assumptions in order to show that the notion of correct conceivability can still play a specific limited role in the epistemology of modality. (shrink)

Intuitions based on the first-person perspective can easily mislead us about what is and is not conceivable.1 This point is usually made in support of familiar reductionist positions on the mind-body problem, but I believe it can be detached from that approach. It seems to me that the powerful appearance of contingency in the relation between the functioning of the physical organism and the conscious mind -- an appearance that depends directly or indirectly on the first- person perspective -- must (...) be an illusion. But the denial of this contingency should not take the form of a reductionist account of consciousness of the usual type, whereby the logical gap between the mental and the physical is closed by conceptual analysis -- in effect, by analyzing the mental in terms of the physical. (shrink)

In a recent paper, Dennis Plaisted examines an important argument that Leibniz gives for the existence of primitive concepts. After sketching a natural reading of this argument, Plaisted observes that the argument appears to imply something clearly inconsistent with Leibniz’s other views. To save Leibniz from contradiction, Plaisted offers a revision. However, his account faces a number of serious difficulties and therefore does not successfully eliminate the inconsistency. We explain these difficulties and defend a more plausible alternative. In the process, (...) we call attention to the neglected topic of Leibniz’s views on the nature of conceiving, and reveal his commitment to the somewhat surprising thesis that one can conceive something through a concept even if one has no conscious grasp of that concept. (shrink)

Conceivability arguments constitute a serious threat against reductive physicalism. Recently, a number of authors have proven and characterized a devastating logical truth centered on these arguments: namely, that their soundness entails the inconceivability of reductive physicalism. In this paper, I demonstrate that this is only a logical truth when reductive physicalism is interpreted in its stronger, intrinsic sense, as opposed to its weaker—yet considerably more popular—extrinsic sense. The basic idea generalizes: perhaps surprisingly, stronger forms of reduction are uniquely resistant (...) to the conceivability arguments opposing them. So far as the modal epistemology of reduction is concerned, therefore, it pays to go intrinsic. (shrink)

Open peer commentary on the target article “Who Conceives of Society?” by Ernst von Glasersfeld. First paragraph: I have long admired Ernst von Glasersfeld’s attempt to render rationally viable a radical constructivist epistemology. And, I have long wished to see him turn his attention more fully to issues of social interchange. The present offering moves cogently in this direction, and this is all to the good. However, immersed in the dialogues on social construction as I am, the offering also poses (...) an array of particular problems, both intellectual and practical. I offer the following in the service of pressing forward the dialogues on knowledge, self and the social world. (shrink)

In this paper I argue that certain so-called conceivability arguments fail to show that a currently popular version of physicalism in the philosophy of mind is false. Concentrating on an argument due to David Chalmers, I first argue that Chalmers misrepresents the relation between conceivability and possibility. I then argue that the intuition behind the conceivability of so-called zombie worlds can be accounted for without having to suppose that such worlds are genuinely conceivable. I conclude with some (...) general remarks about the nature of conceivability. (shrink)

I present an approach to our conceiving absolute impossibilities—things which obtain at no possible world—in terms of ceteris paribus intentional operators: variably restricted quantifiers on possible and impossible worlds based on world similarity. The explicit content of a representation plays a role similar in some respects to the one of a ceteris paribus conditional antecedent. I discuss how such operators invalidate logical closure for conceivability, and how similarity works when impossible worlds are around. Unlike what happens with ceteris paribus (...) counterfactual conditionals, the closest worlds are relevantly closest belief-worlds: closest to how things are believed to be, rather than to how they are. Also, closeness takes into account apriority and the opacity of intentional contexts. (shrink)

According to the ‘conceivability argument’ [1] it’s conceivable that a conscious human being H may have a perfect physical duplicate H* who isn’t conscious, [2] whatever is conceivable is possible, therefore [3] H* may possibly exist. This paper argues that the conceivability argument can’t help in discussion of the ‘mind–body problem’ even if [2] is allowed to be true. This is not because [1] is false, but because we don’t and can’t know enough about the nature of the (...) physical to know whether or not [1] is true. This follows from ‘the silence of physics’—the fact that physics neither does nor can tell us about the intrinsic non-structural nature of the physical, and the consequences of this fact for any adequate account of the meaning of the word ‘physical’. (shrink)

This article is a discussion of Hume's maxim Nothing we imagine is absolutely impossible. First I explain this maxim and distinguish it from the principle Whatever cannot be imagined (conceived), is impossible. Next I argue that Thomas Reid's criticism of the maxim fails and that the arguments by Tamar Szábo Gendler and John Hawthorne for the claim that "it is uncontroversial that there are cases where we are misled" by the maxim are unconvincing. Finally I state the limited but real (...) value of the maxim: it does help us, in certain cases, reliably to make up our minds. Along the way I show that Reid, his criticism of the maxim notwithstanding, actually employs it, and I furthermore argue that the principle What is inconceivable, is impossible is spurious. (shrink)

A. Collins once argued that time travel is only imaginable if we relate the "event" out of context. John Hospers argues that it is logically possible for an iron bar to float in water even if it is actually (empirically) impossible. My point in this piece is that Hospers relies on viewing the floating out of context, in Walt Disney fashion; but that is no way to establish any kind of possibility. I also discuss "conceivability", a term frequently used (...) either to clarify logical possibility or to interchange for the same. I argue that it cannot do either. (shrink)

The paper presents a dilemma for both epistemic and non-epistemic versions of conceivability-based accounts of modal knowledge. On the one horn, non-epistemic accounts do not elucidate the essentialist knowledge they would be committed to. On the other, epistemic accounts do not elucidate everyday life de re modal knowledge. In neither case, therefore, do conceivability accounts elucidate de re modal knowledge.

Hill and Levine offer alternative explanations of these conceivabilities, concluding that these conceivabilities are thereby defeated as evidence. However, this strategy fails because their explanations generalize to all conceivability judgments concerning phenomenal states. Consequently, one could defend absolutely any theory of phenomenal states against conceivability arguments in just this way. This result conflicts with too many of our common sense beliefs about the evidential value of conceivability with respect to phenomenal states. The general moral is that the (...) application of such principles of explanatory defeat is neither simple nor straightforward. (shrink)

We often decide whether a state of affairs is possible by trying to mentally depict a scenario where the state in question obtains . These mental acts seem to provide us with an epistemic route to the space of possibilities. The problem this raises is whether conceivability judgments provide justification-conferring grounds for the ensuing possibility-claims . Although the question has a long history, contemporary interest in it was, to a large extent, prompted by Kripke's utilization of modal intuitions in (...) the course of propounding certain influential theses in the philosophy of language and mind. The interest has been given a further boost by the recent two-dimensional approach to the Kripkean framework. In this paper, I begin by providing a detailed examination of a most recent attempt to defend the thesis and argue that it is unsuccessful. This is followed by presenting my own gloss on Kripke's explanation of the illusions of contingency and I close by raising a general problem intended to undermine the prospects for a successful defense of the thesis. (shrink)

The notion of conceivability has traditionally been regarded as crucial to an account of modal knowledge. Despite its importance to modal epistemology, there is no received explication of conceivability. In recent discussions, some have attempted to explicate the notion in terms of epistemic possibility. There are, however, two notions of epistemic possibility, a more familiar one and a novel one. I argue that these two notions are independent of one another. Both are irrelevant to an account of modal (...) knowledge on the predominant view of modal reality. Only the novel notion is relevant and apt on the competing view of modal reality; but this latter view is problematic in light of compelling counterexamples. Insufficient care regarding the independent notions of epistemic possibility can lead to two problems: a gross problem of conflation and a more subtle problem of obscuring a crucial fact of modal epistemology. Either problem needlessly hampers efforts to develop an adequate account of modal knowledge. I conclude that the familiar notion of epistemic possibility should be eschewed in the context of modal epistemology. (shrink)

This paper challenges the soundness of the two-dimensional conceivability argument against the derivation of phenomenal truths from physical truths in light of a hyperintensional, ground-theoretic regimentation of the ontology of consciousness. The regimentation demonstrates how ontological dependencies between truths about consciousness and about physics cannot be witnessed by epistemic constraints, when the latter are recorded by the conceivability—i.e., the epistemic possibility—thereof. Generalizations and other aspects of the philosophical significance of the hyperintensional regimentation are further examined.

To what extent and how is conceivability a guide to possibility? This essay explores general philosophical issues raised by this question, and critically surveys responses to it by Descartes, Hume, Kripke and "two-dimensionalists.".

This book defies the reigning dismissal of the philosophy of nature by turning to what Aristotle, Kant, and Hegel have had to say about nature and critically thinking through their arguments so as to reconstruct a comprehensive account of the universe. Aided by the contributions of more recent thinkers, such as Albert Einstein, Werner Heisenberg, Michael B. Foster, and Hans Jonas, Conceiving Nature shows how the mechanics of matter in motion, the physics of electromagnetism, and chemical process provide all that (...) is needed for life to emerge and give rise to rational animals capable of knowing nature in truth. The work contains detailed discussions of much of Aristotle's writing on nature, of Kant's Metaphysical Foundations of Natural Science, and of Hegel's Philosophy of Nature. (shrink)

I argue for an analysis of conceivability as a form of modal knowledge: to conceive of p's being true is to know that "Possibly, p" is true.

Kripke’s antimaterialist argument, under David Papineau’s new interpretation, is not based on assuming that the conceivability of zombies entails possibility and does not lead to the conclusion that materialism is false but rather to the conclusion that we are all in the grip of the intuitive feeling that materialism is false. Leaving it open whether or not Papineau’s interpretation of Kripke’s argument is correct, I argue here that by appealing to the intuition of dualism we can see that the (...) conceivability of zombies is not a reliable guide to possibility. (shrink)

The notion of conceivability has traditionally been regarded as crucial to an account of modal knowledge. Despite its importance to modal epistemology, there is no received explication of conceivability. One purpose of this paper is to argue that the notion is not fruitfully explicated in terms of the imagination. The most natural way of presenting a notion of conceivability qua imaginability is open to cogent criticism. In order to avoid such criticism, an advocate of the modal insightfulness (...) of the imagination must broaden the idea of what it is to be imaginable. I argue that this required broadening renders the imagination idle . Consequently, I distinguish two different accounts of the evidential basis of modal knowledge and present a more general argument that concludes that the very notion of conceivability should be eschewed in modal epistemology. (shrink)

In The Conscious Mind, D. Chalmers appeals to his semantic framework in order to show that conceivability, as employed in his "zombie" argument for dualism , is sufficient for genuine possibility. I criticize this attempt.

Hume establishes a link between our capacity to conceive or form “clear and distinct ideas” and metaphysical possibility. Hume’s so-called Conceivability Principle is usually assumed to be epistemic: conceivability is supposed to inform us of independent metaphysical facts. In this chapter, however, I argue that Hume is not engaged in modal epistemology. For Hume, there is no epistemic relation between conceivability and an independent metaphysical world of possibilities. On my reading, conceivability is more like the “mètre (...) étalon” in Paris—the standard unit of measurement of length—than a window or telescope into some metaphysical world. Conceivability is the standard of metaphysical possibility. And just as the meter is defined as a certain distance of light traveled, for Hume, conceivability is defined in terms of the liberty of the imagination. I discuss how Hume deploys conceivability along with knowledge—the standard of metaphysical necessity—as tools for measuring or assessing the alleged metaphysical necessity of a cause to every beginning of existence and the alleged rational foundation of causal inferences. (shrink)

The purpose of this article is to defend Hume's claim that whatever is conceivable is possible from a criticism by William Kneale. Kneale argues that although a mathematician can conceive of the falsehood of the Goldbach conjecture, he does not conclude that it is not necessarily true. The author suggests that by taking into account Hume's distinction between intuitive and demonstrative knowledge, a revised version of his claim can be offered which is not open to Kneale's criticism.

This article is a discussion of Hume's maxim Nothing we imagine is absolutely impossible. First I explain this maxim and distinguish it from the principle Whatever cannot be imagined (conceived), is impossible. Next I argue that Thomas Reid's criticism of the maxim fails and that the arguments by Tamar Szábo Gendler and John Hawthorne for the claim that “it is uncontroversial that there are cases where we are misled” by the maxim are unconvincing. Finally I state the limited but real (...) value of the maxim: it does help us, in certain cases, reliably to make up our minds. Along the way I show that Reid, his criticism of the maxim notwithstanding, actually employs it, and I furthermore argue that the principle What is inconceivable, is impossible is spurious. (shrink)

In contemporary philosophy of mind, the conceivability argument against physicalism is often used to support a form of dualism, which takes consciousness to be ontologically fundamental and distinct from physical matter. Recently, some proponents of the conceivability argument have also shown interest in panpsychism, which is the view that mentality is ubiquitous in the natural world. This paper examines the extent to which panpsychism can be sustained if the conceivability argument is taken seriously. I argue that panpsychism’s (...) ubiquity claim permits a strong reading or a weak reading. This presents a dilemma. On the one hand, the strong reading, which is typically characterised as a form of monism, is undermined by the conceivability argument. On the other hand, the weak reading, while compatible with the conceivability argument, turns out just to be a special case of dualism. I also show that the related position of panprotopsychism cannot provide a tenable monist position because it too cannot withstand the challenge of the conceivability argument. Therefore, if the conceivability argument is taken seriously, then we are committed to a dualist metaphysics, regardless of whether or not we accept the ubiquity claim. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Reviewed by:Conceiving People: Genetic Knowledge and the Ethics of Sperm and Egg Donation by Daniel GrollMelissa MoschellaGROLL, Daniel. Conceiving People: Genetic Knowledge and the Ethics of Sperm and Egg Donation. New York: Oxford University Press, 2021. 256 pp. Cloth, $74.00In Conceiving People, Daniel Groll argues that, generally speaking, those intending to conceive with the help of donor gametes have a moral obligation to use an open donor rather than (...) an anonymous one. This obligation is grounded on the likelihood that their children will have a significant future interest in acquiring genetic knowledge, defined as "knowledge of who one's genetic progenitors are." Groll labels this view the significant interest view, which he argues for largely on empirical grounds.Before beginning his defense of the significant interest view, Groll dedicates chapter 2 to arguing that parents who conceive with the help of donor gametes should not keep this a secret from their children. His position on this point reflects the current consensus on the subject, but he offers a novel argument for it, based on the claim that keeping "the secret" in itself harms the parent–child relationship by inherently compromising the intimacy proper to that relationship.Chapter 3 presents the significant interest view in greater detail, distinguishing it from two other approaches: (1) the "Profound Prudential Good view," taken from the work of David Velleman, according to which "genetic knowledge is a profound prudential good and people who lack it will have tremendous trouble figuring out who they are," and (2) the view that "people have a right to genetic knowledge." Unlike these competing approaches, Groll's view "does not directly depend on claims about the value of genetic knowledge" but is based primarily on the fact that "many donor-conceived people are subjectively interested in having genetic knowledge," combined with the claim that parents have an obligation to promote their children's well-being by satisfying their worthwhile significant subjective interests. Because Groll's argument depends on the worth and significance of genetic knowledge, it is vulnerable to what he calls the "sideshow objection"—that is, that the significant interest view is just a sideshow, and the worth of genetic knowledge is what actually does the important normative work. At the same time, Groll's view that the interest in genetic knowledge is worthwhile and significant also leaves him open to the "bionormativity objection," according to which the interest in genetic knowledge "is morally problematic in virtue of evincing and entrenching a kind of bionormative prejudice" that sees the biological family as a normative ideal. [End Page 141]Responding to these two objections is the task of chapters 4 and 5. Chapter 4 argues that genetic knowledge is an objective but "prudentially optional good," meaning that "its value is not fungible, but a life that lacks it is not thereby impoverished." This distinguishes Groll's view from the profound prudential good view, which he characterizes as a form of "genetic chauvinism." Groll argues that genetic knowledge is valuable because it can provide insight into personal identity by answering questions about how I came to be and who I am like, but that the genetic knowledge is not the only or best way to answer these questions (thus explaining why it is optional, and why the significant interest view is not just a sideshow).Chapter 5 addresses the "bionormativity objection," which includes both "heteronormativity" (privileging families headed by a mother and father) and "biogenetic normativity" (privileging genetically related families). Groll ultimately responds to this objection by arguing that, even if (as Groll believes) our current society overemphasizes the importance of genetic relationships, "the interest in genetic knowledge is rationally intelligible quite apart from the bionormative social milieu that surrounds it."Chapters 6 through 8 present the implications of the preceding argument. Chapter 6 argues that the reasons to use an open donor are generally conclusive, because most reasons parents might have to use an anonymous donor do not outweigh the child's significant interest in obtaining genetic knowledge. Chapter 7 considers the responsibilities of gamete donors, arguing that gamete donation is not morally objectionable because it is permissible for donors to transfer prospective parenthood responsibilities... (shrink)

This paper compares and contrasts two conceivability arguments: the zombie argument (ZA) against physicalism, and the perfect actor argument (AA) against behaviourism. I start the paper by assuming that the arguments are of the same kind, and that AA is sound. On the basis of these two assumptions I criticize the most common philosophical suggestions in the literature today about what is wrong with ZA, and what is right in it. I end the paper by suggesting that the comparison (...) between the two arguments makes plausible an epistemic response to ZA according to which the conceivability of a zombie - that is, someone identical to me in all physical respects but different in some phenomenal respect - is being confused with the conceivability of something else, i.e. someone identical to me in physical respects that are epistemically available, but different in some phenomenal respect. (shrink)

It is often supposed that in order to refute the view that laws of nature are necessary truths it is sufficient to appeal to Hume's argument from the conceivability of to the possibility of their being false. But while Hume's argument does present the necessitarian with insuperable difficulties it needs to be made clear just what these are. The mere appeal to Hume is quite insufficient for what he says can be interpreted in more than one way. And if (...) it constitutes an argument rather than a mere assertion Kneale has given reason to suppose that it is at least not obviously valid. The upshot of this article is that Hume's argument may be seen as a direct challenge to the notion that there could be propositions whose modal value is necessarily "opaque to the human intellect". (shrink)

Dispositionalists maintain that the essence of a property is determined by the powers it confers upon its bearers and, as a result, that there is a necessary connection between properties and their powers. Contingentists, in contrast, maintain that the connection is contingent. The ability to conceive of a property as failing to confer some of its powers is often cited as an objection against dispositionalism. The standard dispositionalist response to this objection is to redescribe the imagined scenario so that it (...) no longer serves as a threat. Using the literature on phenomenal concepts as inspiration, I develop a new defense of dispositionalism that echoes Brian Loar's (1990) response to conceivability arguments against physicalism. Not only can Loar's general strategy be usefully applied to this new context, there is a sense in which that strategy works better here than it does in the original context in which Loar deployed it. (shrink)

In this paper, we argue that ‘Weak Modal Rationalism’, which is the view that ideal primary positive conceivability entails primary metaphysical possibility, is self-defeating. To this end, we outline two reductio arguments against ‘Weak Modal Rationalism’. The first reductio shows that, from supposing that ‘Weak Modal Rationalism’ is true, it follows that conceivability both is and is not conclusive evidence for possibility. The second reductio shows that, from supposing that ‘Weak Modal Rationalism’ is true, it follows that it (...) is possible that ‘Weak Modal Rationalism’ is necessarily false, and hence that ‘Weak Modal Rationalism’ is false. We then argue that adopting a weaker position according to which conceivability is merely prima facie evidence for possibility provides limited protection from our criticism of conceivability arguments. (shrink)

The capacity to represent things to ourselves as possible plays a crucial role both in everyday thinking and in philosophical reasoning; this volume offers much-needed philosophical illumination of conceivability, possibility, and the relations between them. Thirteen leading philosophers present specially-written essays, and a substantial introduction is provided by the volume editors, who demonstrate the importance of these topics to a wide range of issues in contemporary philosophy.