Online research in philosophy

Is knowledge justified true belief? Most philosophers believe that the answer is clearly ‘no’, as demonstrated by Gettier cases. But Gettier cases don’t obviously refute the traditional view that knowledge is justified true belief (JTB). There are ways of resisting Gettier cases, at least one of which is partly successful. Nevertheless, when properly understood, Gettier cases point to a flaw in JTB, though it takes some work to appreciate just what it is. The nature of the flaw helps us better understand the nature of knowledge and epistemic justification. I propose a crucial improvement to the traditional view, relying on an intuitive and independently plausible metaphysical distinction pertaining to the manifestation of intellectual powers, which supplements the traditional components of justification, truth and belief.

In response to a collection of essays in Jonathan Kvanvig's (1996) Warrant in Contemporary Epistemology: Essays in Honor of Plantinga's Theory of Knowledge, Alvin Plantinga notices that certain Gettier-style examples undermine his (1993b) canonical account of epistemic warrant as delineated in Warrant and Proper Function. In hopes to clarify how his account survives Gettier's purchase, he (1996; 2000) argues that a belief has warrant sufficient for knowledge only when produced in a favorable cognitive mini-environment. In Warranted Christian Belief Plantinga (2000) specifies a condition required for a cognitive mini-environment's favorability. I argue that this condition falls prey to counterexample. Then I investigate a possible solution, which I reason fails as well.

The Proper Functionist account of warrant – like many otherexternalist accounts – is vulnerable to certain Gettier-style counterexamples involving accidentally true beliefs. In this paper, I briefly survey the development of the account, noting the way it was altered in response to such counterexamples. I then argue that Alvin Plantinga's latest amendment to the account is flawed insofar as it rules out cases of true beliefs which do intuitively strike us as knowledge, and that a conjecture recently put forward by Thomas Crisp is also defective. I conclude by presenting my own suggestion as to how the account can be made less vulnerable to counterexamples involving accidentally true beliefs. Although I stay within the confines of Proper Functionism here, I think that my proposal (modulo a few details) could be attached to other externalist accounts of warrant as well.

Nowadays the traditional quest for certainty seems not only futile but pointless. Resisting skepticism no longer seems to require meeting the Cartesian demand for an unshakable foundation for knowledge. True beliefs can be less than maximally justified and still be justified enough to qualify as knowledge, even though some beliefs that are justified to the same extent are false. Yet a few philosophers suggest that there is a special sort of justification that only true beliefs can have. Call it 'full justification' or simply 'warrant.' One such philosopher is Trenton Merricks. He takes warrant to be "that, whatever precisely it is, which together with truth makes the difference between knowledge and mere true belief," and argues that only true beliefs can have it.1 In his view, then, warrant makes the difference between knowledge and mere belief. Interestingly, Merricks does not concern himself with the nature of this remarkable property. He prefers a "formal characterization" of warrant as the "gap filler" between knowledge and mere true belief. Whatever warrant is exactly, a warranted belief cannot be true accidentally, for then the belief would not qualify as knowledge.

The Gettier Problem is the problem of revising the view that knowledge is justified true belief in a way that is immune to Gettier counter-examples. The “Gettier Problem problem”, according to Lycan, is the problem of saying what is misguided about trying to solve the Gettier Problem. In this paper I take up the Gettier Problem problem. I distinguish giving conditions that are necessary and sufficient for knowledge from giving conditions that explain why one knows when one does know. I argue that the problem with the Gettier Problem is that it requires us to articulate conditions that suffice for knowledge even if those conditions are non-explanatory. After defending this view, I take up two related methodological issues, one about the evidence that can be given in favor of an account of knowledge, and one about the role that investigating justification might play in investigating knowledge.

On the “Russellian” solution to the Gettier problem, every Gettier case involves the implicit or explicit use of a false premise on the part of the subject. We distinguish between two senses of “justification” ---“legitimation” and “justification proper.” The former does not require true premises, but the latter does. We then argue that in Gettier cases the subject possesses “legitimation” but not “justification proper,” and we respond to many attempted counterexamples, including several variants of the Nogot scenario, a case involving induction, and the case of the sight-seer and the barn. Finally, we show that, given our analysis, any challenge to a belief’s justification on the grounds that it might be “Gettierized” only requires an argument that one’s premises are themselves likely to be true, moving backwards along the object-Ievel regress. Hence, a move to externalism is neither useful nor necessary in response to the Gettier problem.

This paper advances the debate over the question whether false beliefs may nevertheless have warrant, the property that yields knowledge when conjoined with true belief. The paper’s first main part—which spans Sections 2–4—assesses the best argument for Warrant Infallibilism, the view that only true beliefs can have warrant. I show that this argument’s key premise conflicts with an extremely plausible claim about warrant. Sections 5–6 constitute the paper’s second main part. Section 5 presents an overlooked puzzle about warrant, and uses that puzzle to generate a new argument for Warrant Fallibilism, the view that false beliefs can have warrant. Section 6 evaluates this pro-Fallibilism argument, finding ultimately that it defeats itself in a surprising way. I conclude that neither Infallibilism nor Fallibilism should now constrain theorizing about warrant.

Let ‘warrant’ denote whatever precisely it is that makes the difference between knowledge and mere true belief. A current debate in epistemology asks whether warrant entails truth, i.e., whether (Infallibilism) S’s belief that p is warranted only if p is true. The arguments for infallibilism have come under considerable and, as of yet, unanswered objections. In this paper, I will defend infallibilism. In Part I, I advance a new argument for infallibilism; the basic outline is as follows. Suppose fallibilism is true. An implication of fallibilism is that the property that makes the difference between knowledge and mere belief (which I dub ‘warrant*’) is the conjunctive property being warranted and true . I show that this implication of fallibilism conflicts with an uncontroversial thesis we have learned from reflection on Gettier cases: that nonaccidental truth is a constituent of warrant*. It follows that infallibilism is true. In the second part of the paper, I present and criticize a new argument against infallibilism. The argument states that there are plausible cases where, intuitively, the only thing that is keeping a belief from counting as knowledge is the falsity of that belief. Furthermore, it is plausible that such a belief is warranted and false. So, the argument goes, infallibilism is false. I show that this argument fails.

Infallibilism is the view that a belief cannot be at once warranted and false. In this essay we assess three nonpartisan arguments for infallibilism, arguments that do not depend on a prior commitment to some substantive theory of warrant. Three premises, one from each argument, are most significant: (1) if a belief can be at once warranted and false, then the Gettier Problem cannot be solved; (2) if a belief can be at once warranted and false, then its warrant can be transferred to an accidentally true belief; (3) if a belief can be at once warranted and false, then it can be warranted and accidentally true. We argue that each of these is either false or no more plausible than its denial. Along the way, we offer a solution to the Gettier Problem that is compatible with fallibilism.