Adam Leite

Modern-day heirs of the Cartesian revolution have been fascinated by the thought that one could utilize certain hypotheses – that one is dreaming, deceived by an evil demon, or a brain in a vat – to argue at one fell swoop that one does not know, is not justified in believing, or ought not believe most if not all of what one currently believes about the world. A good part of the interest and mystique of these discussions arises from the contention that the seeds of such arguments lie in our ordinary epistemic practices, so that external world skepticism can arise “from within”. But is this contention correct? I doubt it. Taking skepticism seriously requires that we address this question head on. To do so, I will approach skeptical arguments from a certain vantage point. I will try to stand, as far as possible, with both feet squarely in ordinary life. I will start out with all of our ordinary commitments about what is the case, about what we know or have reason to believe, about when someone knows, is justified, or has good reason to believe something, and about how one should proceed in deciding what to believe. My question, then, will be this. From within that vantage point can I somehow be moved in a reasonable way to accept the conclusion that I know far less about the world around me than I thought, or that epistemically speaking, I really ought not believe much of what I have believed about the world around me? In order for such movement to take place, I will have to find reason from within my ordinary standpoint to discount or reject much of what I ordinarily accept. And of course, that reason will have to come from some..

Traditional epistemological reflection on our beliefs about the world attempts to proceed without presupposing or ineliminably depending upon any claims about the world. It has been argued that epistemological externalism fails to engage in the right way with the motivations for this project. I argue, however, that epistemological externalism satisfyingly undermines this project. If we accept the thesis that certain conditions other than the truth of one's belief must obtain in the world outside of one's mind in order for one to have knowledge (or justified belief) about the world, then there is no good intellectual motivation for taking up the traditional project. This results stands even if we accept the traditional theses that knowledge requires justified belief and that justified belief requires the ability to provide good reasons for one's belief.

“Moorean Dogmatist” responses to external world skepticism endorse courses of reasoning that many people find objectionable. This paper seeks to locate this dissatisfaction in considerations about epistemic responsibility. I sketch a theory of immediate warrant and show how it can be combined with plausible “inferential internalist” demands arising from considerations of epistemic responsibility. The resulting view endorses immediate perceptual warrant but forbids the sort of reasoning that “Moorean Dogmatism” would allow. A surprising result is that Dogmatism’s commitment to immediate epistemic warrant isn’t enough to avoid certain standard arguments for skepticism about the external world.

Guided by an account of the norms governing justificatory conversations, I propose that person-level epistemic justification is a matter of possessing a certain ability: the ability to provide objectively good reasons for one's belief by drawing upon considerations which one responsibly and correctly takes there to be no reason to doubt. On this view, justification requires responsible belief and is also objectively truth-conducive. The foundationalist doctrine of immediately justified beliefs is rejected, but so too is the thought that coherence in one's total belief system is sufficient, or indeed necessary, for justification. The problem of the regress is solved by exploiting the 'localist' idea that in order to possess the ability to justify any given belief, one only needs to be in a position to draw upon appropriate justified background beliefs to provide good reasons for holding the belief; one needn't be able to defend the relevant background beliefs, and so on, all at one sitting.

DeRose appeals to ordinary English usage to support his contextualist semantics for "know"-attributions. A common objection holds that though the relevant assertions are both appropriate and seemingly true, their seeming truth arises merely from their appropriateness. This Warranted Assertability Maneuver (WAM) aims to provide a stand-alone objection by providing a reason not to take the ordinary language data at face-value. However, there is no plausible model or mechanism for the pragmatic phenomena WAMmers must postulate. Given what the WAM requires, it is doubtful it could work out in detail.

I take as my starting point the evident fact that people are capable of modifying their beliefs in response to reasons in the course of deliberation. This fact is sufficient to make notions such as responsibility, blameworthiness, and praiseworthiness applicable to people with regard to their beliefs. If a state is such, and one is such, that one is capable of determining it through one’s best evaluations of reasons in the course of deliberation, then even if it isn’t under one’s voluntary control, it is attributable to one as something for which one is appropriately held accountable. There is thus conceptual space for the possibility of one’s conducting oneself poorly or well with regard to it, and accordingly for the application of praise or criticism. And there is room for an evaluation of whether one has conducted oneself responsibly or irresponsibly – that is, whether one has proceeded in a way that takes proper account of the considerations which one reasonably could have been expected to take account of, or not.

This paper responds to Stephen Hetherington's discussion of my ‘Is Fallibility an Epistemological Shortcoming?’ (2004). The Infallibilist skeptic holds that in order to know something, one must be able to rule out every possible alternative to the truth of one’s belief. This requirement is false. In this paper I first clarify this requirement’s relation to our ordinary practice. I then turn to a more fundamental issue. The Infallibilist holds – along with many non-skeptical epistemologists – that Infallibility is epistemically superior to the epistemic position attained when we have (what we ordinarily call) knowledge. This is false, too, as our ordinary practices show. Ordinary epistemic appraisal does not concern our standing on a scale of evaluation which has Infallibility at its apex. For this reason, even if gradualism is correct, it does not show how Infallibilist skepticism can arise out of our ordinary practice.

According to a common view, the activity of justifying is epistemologically irrelevant: being justified in believing as one does never requires the ability to justify one’s belief. This view runs into trouble regarding the epistemic basing relation, the relation between a person’s belief and the reasons for which the person holds it. The view must appeal to basing relations as part of its account of what it is for a person to be justified in believing as she does, but the view prevents basing relations from doing the needed work. In place of the common view, I propose an account of basing relations which links them to the person’s commitments and hence to her justificatory activity. If this proposal is correct, then positive justificatory status, too, will be conceptually linked to the ability to succeed in the activity of justifying.