What is the connection between justification and the kind of consequence relations that are studied by logic? In this essay, I shall try to provide an answer, by proposing a general conception of the kind of inference that counts as justified or rational.

Conceptual role semanticists argue that concepts are individuated in terms of their roles in cognition. Some prominent conceptual role semanticists argue for the further claim that concepts are individuated in terms of their rational roles in cognition. This further claim places substantive normative constraints on concept-constitutive roles. I argue that conceptual role semanticists can and should resist the claim that conceptual roles must be specified in inherently normative terms.

According to Perceptual Fundamentalism we can have justified perceptual beliefs solely in virtue of having perceptual experiences with corresponding contents. Recently, it has been argued that Perceptual Fundamentalism entails that it is possible to gain an a priori justified belief that perception is reliable by engaging in a suppositional reasoning process of a priori bootstrapping. But I will show that Perceptual Fundamentalists are not committed to a priori bootstrapping being a rational reasoning process. On the most plausible versions of Perceptual (...) Fundamentalism, a priori bootstrapping cannot be used to rationally support anti-sceptical beliefs about the reliability of perception. Moreover, seeing why Perceptual Fundamentalists are not committed to a priori bootstrapping will help us to better understand the nature of the perceptual entitlements that Perceptual Fundamentalists posit, or at least should posit. (shrink)

This paper begins by raising a puzzle about what function our use of the word ‘rational’ could serve. To solve the puzzle, I introduce a view I call Epistemic Communism: we use epistemic evaluations to promote coordination among our basic belief-forming rules, and the function of this is to make the acquisition of knowledge by testimony more efficient.

In section 1, I develop epistemic communism, my view of the function of epistemically evaluative terms such as ‘rational’. The function is to support the coordination of our belief-forming rules, which in turn supports the reliable acquisition of beliefs through testimony. This view is motivated by the existence of valid inferences that we hesitate to call rational. I defend the view against the worry that it fails to account for a function of evaluations within first-personal deliberation. In the rest of (...) the paper, I then argue, on the basis of epistemic communism, for a view about rationality itself. I set up the argument in section 2 by saying what a theory of rational deduction is supposed to do. I claim that such a theory would provide a necessary, sufficient, and explanatorily unifying condition for being a rational rule for inferring deductive consequences. I argue in section 3 that, given epistemic communism and the conventionality that it entails, there is no such theory. Nothing explains why certain rules for deductive reasoning are rational. (shrink)

Just as Quine and others have argued for a deflationism about the property of truth, Sinan Dogramaci has argued for a deflationism about rationality. Specifically, Dogramaci claims that we have no reason to think that the basic, deductive, epistemic rules we call “rational” have any sort of “unifying property.” A “unifying property” is a property that is necessary, sufficient, and explanatorily illuminating. My goal in this paper is to undermine Dogramaci’s argument for this radical position. I do this by first (...) outlining Dogramaci’s distinctive view on the function of our epistemically evaluative terms. This view, called epistemic communism, has it that the function of terms like “rational” is to support the coordination of our community on a single set of epistemic rules. I offer a reconstruction of Dogramaci’s argument from epistemic communism to deflationism about rationality. I next raise an objection to Dogramaci’s argument: different sets of epistemic rules do not equally support the coordinative function. Dogramaci has a response to this objection, but I argue that this response is less than satisfactory. I illustrate that this response is unsatisfactory by employing work by David Enoch and Joshua Schechter. After pushing my objection to Dogramaci’s argument, I develop, on Dogramaci’s behalf, an objection to my non-deflationary attempt to undermine his argument. In the final section of the paper, I reply to this objection offered on Dogramaci’s behalf and conclude that whether we are epistemic communists or not, we need not accept deflationism. (shrink)

What accounts for the capacity of ordinary speakers to comprehend utterances of their language? The phenomenology of hearing speech in one’s own language makes it tempting to many epistemologists to look to perception for an answer to this question. That is, just as a visual experience as of a red square is often taken to give the perceiver immediate justification for believing that there is a red square in front of her, perhaps an auditory experience as of the speaker asserting (...) that p gives the competent hearer immediate justification for believing that the speaker has asserted that p. My aim here is to offer reasons for resisting this temptation. I argue that the perceptual model cannot adequately account for the hearer’s justification in many cases. The arguments here also allow us to draw certain further morals about the role of phenomenology in the epistemology of perception. (shrink)

According to the Reasoning View about normative reasons, facts about normative reasons for action can be understood in terms of facts about the norms of practical reasoning. I argue that this view is subject to an overlooked class of counterexamples, familiar from debates about Subjectivist theories of normative reasons. Strikingly, the standard strategy Subjectivists have used to respond to this problem cannot be adapted to the Reasoning View. I think there is a solution to this problem, however. I argue that (...) the norms of practical reasoning, like the norms of theoretical reasoning, are characteristically defeasible, in a sense I make precise. Recognizing this property of those norms makes space for a solution to the problem. The resulting view is in a way analogous to the familiar defeasibility theory of knowledge, but it avoids a standard objection to that theory. (shrink)

Extended Rationality: A Hinge Epistemology provides a novel account of the structure of epistemic justification. Its central claim builds upon Wittgenstein's idea in On Certainty that epistemic justifications hinge on some basic assumptions and that epistemic rationality extends to these very hinges. It exploits these ideas to address major problems in epistemology, such as the nature of perceptual justifications, external world skepticism, epistemic relativism, the epistemic status of basic logical laws, of the Principle of the Uniformity of Nature, of our (...) belief in the existence of the past and of other minds, and the nature of testimonial justification. Along the way, further technical issues, such as the scope of the Principle of Closure of epistemic operators under known entailment, the notion of transmission failure, and the existence of entitlements are addressed in new and illuminating ways. (shrink)

This paper explores the problems that are raised by a certain traditional sceptical paradox. The conclusion will be that the most challenging problem raised by this paradox does not primarily concern the justification of beliefs; it concerns the justification of belief-forming practices. This conclusion is supported by showing that if we can solve the sceptical problem for belief-forming practices, then it will be a relatively straightforward matter to solve the problem that concerns the justification of beliefs.

We are justified in employing the rule of inference Modus Ponens (or one much like it) as basic in our reasoning. By contrast, we are not justified in employing a rule of inference that permits inferring to some difficult mathematical theorem from the relevant axioms in a single step. Such an inferential step is intuitively “too large” to count as justified. What accounts for this difference? In this paper, I canvass several possible explanations. I argue that the most promising approach (...) is to appeal to features like usefulness or indispensability to important or required cognitive projects. On the resulting view, whether an inferential step counts as large or small depends on the importance of the relevant rule of inference in our thought. (shrink)

This paper offers an account of the a priori. According to this account, the fundamental notion is not that of a priori knowledge, or even of a priori justified belief, but a notion of an a priori justified inferential disposition. The rationality or justification of such a priori justified inferential dispositions is explained purely by some of the basic cognitive capacities that the thinker possesses, independently of any further experiences or other conscious mental states that the thinker happens to have (...) had. It is then shown how a priori justified inferences and beliefs can be explained on the basis of such a priori justified inferential dispositions. (shrink)