My area of specialization is epistemology. My focus has been on a cluster of issues related to the notion of a defeater — something that causes you to lose justification for one of your beliefs. Any minimally rational person is familiar with this phenomenon. As new information rolls in, sometimes old beliefs have got to go. And yet there are many philosophical puzzles about both the nature and the extent of defeat. My research explores these puzzles.
Some of the theses I have defended include:
Some links:
Unjustified Defeaters (Forthcoming, Erkenntnis)
A number of philosophers have recently claimed that unjustified beliefs can be defeaters. However these claims have been made in passing, occurring in the context of defenses of other theses. As a result, the claim that unjustified beliefs can be defeaters has been neither vigorously defended nor thoroughly explained. This paper fills that gap. It begins by identifying problems with the two most in-depth accounts of the possibility of unjustified defeaters due to Bergmann and Pryor. It then offers a revised version of Pryor’s account. On this proposal, an unjustified belief can be a defeater if it is rational, all things considered. If a belief is rational, all things considered, it can require one to abandon other beliefs with which it conflicts—even if it is unjustified. Finally, this paper shows that the proposed account of unjustified defeaters is one that can and should be embraced by leading accounts of justified belief as diverse as reliabilism and evidentialism.
Fallible Reasons on Behalf of Fallibilism (Forthcoming, Synthese)
In this paper I introduce a problem regarding whether there are good reasons to accept fallibilism about justified belief. According to this species of fallibilism, one can be justified in believing a proposition on the basis of reasons that do not justify certainty. Call such reasons “fallible reasons.” The problem is this: can one justifiably believe fallibilism on the basis of fallible reasons? To do so would seem to beg the question. If you are undecided as to whether you should accept anything on the basis of fallible reasons, then you should also be undecided as to whether you should accept fallibilism on the basis of such reasons. In this paper I consider several possible responses to this problem. I argue that the most appealing is to grant that good but fallible reasons on behalf of fallibilism are possible, and that this shows that one’s basic rational commitments cannot be defended in a non-circular fashion.
Unreasonable Cartesian Doubt (Forthcoming, Philosophia)
In this paper I argue that Cartesian skepticism about the external world is self-defeating. The Cartesian skeptic holds that we are not justified in believing claims about the external world on the grounds that we cannot rule out the possibility of our being in a radical skeptical scenario. My argument against this position builds upon a critique of Wilson (2012). Wilson argues that the Cartesian’s skeptical reasoning commits him to mental state skepticism and that this undermines his ability to claim that he is truly skeptical about the external world. I show that Wilson’s argument does not succeed. She is correct that the Cartesian is committed to mental state skepticism. However, she is mistaken in thinking that there is anything incoherent about combining the Cartesian position that one ought to doubt external world claims with doubt about whether one is in fact such a skeptic. I propose an alternative explanation as to why mental state skepticism proves to be the Cartesian’s undoing. I suggest that mental state skepticism leads to epistemic skepticism and that this undermines the Cartesian’s position that belief about the external world is unjustified.
The Problem of Respecting Higher-Order Doubt (Philosophers' Imprint, 2013)
This paper argues that higher-order doubt generates an epistemic dilemma. One has a higher-order doubt with regards to P insofar as one justifiably withholds belief as to what attitude towards P is justified. That is, one justifiably withholds belief as to whether one is justified in believing, disbelieving, or withholding belief in P. Using the resources provided by Richard Feldman’s recent discussion of how to respect one’s evidence, I argue that if one has a higher-order doubt with regards to P, then one is not justified in having any attitude towards P. Otherwise put, no attitude towards the doubted proposition respects one’s higher-order doubt. I argue that the most promising response to this problem is to hold that when one has a higher-order doubt about P, the best one can do to respect such a doubt is to simply have no attitude towards P. Higher- order doubt is thus much more rationally corrosive than non-higher-order doubt as it undermines the possibility of justifiably having any attitude towards the doubted proposition.
Weak Inferential Internalism (Journal of Philosophical Research, 2012)
Inferential internalism holds that for one to be inferentially justified in believing P on the basis of E one must be justified in believing that E makes probable P. Inferential internalism has long been accused of generating a vicious regress on inferential justification that has drastic skeptical consequences. However, recently Hookway and Rhoda have defended a more modest form of internalism that avoids this problem. They propose a form of weak inferential internalism according to which internalist conditions are restricted to only certain kinds of inferential justification. In this paper, I clarify and argue against weak internalism. I contend that while weak internalism avoids the vicious regress, it does so at the cost of compromising its internalist credentials. For I show that unless weak internalism makes an arbitrary distinction between individuals who believe for the very same reasons, the view collapses into externalism.
In “Weak Inferential Internalism” I defended the frequently voiced criticism that any internalist account of inferential justification generates a vicious regress. My defense involved criticizing a recent form of internalism, “Weak Inferential Internalism” (WII) defended by Hookway and Rhoda. I argued that while WII does not generate a vicious regress, the position is only distinguishable from externalism insofar as it makes an arbitrary distinction between individuals who believe for the very same reason. Either way, WII is not a defensible internalist account of inferential justification. In his “In Defense of Weak Inferential Internalism,” Rhoda has responded to my dilemma argument. He argues that it is mistaken to assume that WII must be incompatible with externalism, and that contrary to my claims, WII is distinguishable from externalism in several ways. In this reply, I explain why none of Rhoda’s replies suggest that there is a defensible internalist account of inferential justification.
Inferential Internalism and Reflective Defeat (Philosophia, 2012)
Inferential Internalists accept the Principle of Inferential Justification (PIJ), according to which one has justification for believing P on the basis of E only if one has justification for believing that E makes probable P. Richard Fumerton has defended PIJ by appeal to examples, and recently Adam Leite has argued that this principle is supported by considerations regarding the nature of responsible belief. In this paper, I defend a form of externalism against both arguments. This form of externalism recognizes what I call the phenomenon of reflective defeat: if one is justified in not believing that E makes probable P, then this defeats whatever justification one has for believing P upon the basis of E. I argue that this modified version of externalism has the virtue of accommodating the intuitions that motivate internalism, without the cost of the vicious regress that makes internalism so unattractive.
In Defense of Epistemic Circularity (Acta Analytica, 2011)
In this paper I defend epistemic circularity by arguing that the “No Self- Support” principle (NSS) is false. This principle, ultimately due to Fumerton (1995), states that one cannot acquire a justified belief in the reliability of a source of belief by trusting that very source. I argue that NSS has the skeptical consequence that the trustworthiness of all of our sources ultimately depends upon the trustworthiness of certain fundamental sources – sources that we cannot justifiably believe to be reliable. This is a problem, I claim, because if the trustworthiness of all of our sources depends upon sources that we should not believe to be reliable, then a reflective individual should not trust any of his sources at all. The hidden cost of rejecting epistemic circularity is thus the unacceptable skeptical thesis that reflective individuals like you and I have no justified beliefs whatsoever.