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The main thesis of this paper is that it is not possible to determine the nature of epistemic justification apart from scientific psychological investigation. I call this view the strong thesis of methodological psychologism. Two sub-theses provide the primary support for this claim. The first sub-thesis is that no account of epistemic justification is correct which requires for the possession of at least one justified belief a psychological capacity which humans do not have. That is, the correct account of epistemic justification must be psychologically realistic. The second sub-thesis is that it is not possible to determine whether an account of epistemic justification is psychologically realistic apart from scientific psychological investigation. After defending these subtheses, I point out some interesting consequences of the overall thesis which present a challenge to traditional epistemology.

The author argues that the concept of justification is viewed best through elucidation of the processes of ethical and epistemic justification, with specific attention paid to what has been dubbed the "internalist/externalist" distinction in such justification. The first part of the argument clarifies the nature of the distinction as it occurs in ethics and then epistemic justification, noting that there is a parallel between the uses of the distinction, but that it is the way in which the uses are not parallel that is most salient for conceptual purposes. The author then claims that there is an analogous distinction, frequently made in ethical justification, and that is the alleged normative/descriptive distinction. A look at the intersection of that distinction with the internalist/externalist juncture yields the notion that epistemic justification, in particular, could benefit from an externalist/ descriptive approach. Finally, the author argues that we would do well to apply some of the work of the social sciences to epistemic justification theory. The author concludes that the concept of justification includes all four components (internalist, externalist, nor mative, and descriptive) and that clarification of justification simpliciter involves an examination of justification in its various modes.

Epistemic Internalism (EI) is the claim that an agent S is justified in believing that p at a time t iff S has either an actual or potential direct awareness of the grounds or properties that confer justification on p at t . In this paper I argue that EI does not provide the proponent of EI with an intuitively clear analysis of epistemic justification. More exactly, after identifying two different versions of EI – a weak version and a strong version – I offer some general considerations for thinking that neither the weak version nor the strong version provides the proponent of EI with a plausible analysis of epistemic justification and conclude, therefore, that EI itself cannot be considered a plausible analysis of epistemic justification.

In order for us to have epistemic justification, Sinnott-Armstrong believes we do not have to be able to rule out all sceptical hypotheses. He suggests that it is sufficient if we have 'modestly justified beliefs', i.e., if our evidence rules out all non-sceptical alternatives. I argue that modest justification is not sufficient for epistemic justification. Either modest justification is independent of our ability to rule out sceptical hypotheses, but is not a kind of epistemic justification, or else modest justification is a kind of epistemic justification, but is not truly independent of our ability to rule out sceptical hypotheses.

According to a captivating picture, epistemic justification is essentially a matter of epistemic or evidential likelihood. While certain problems for this view are well known, it is motivated by a very natural thought – if justification can fall short of epistemic certainty, then what else could it possibly be? In this paper I shall develop an alternative way of thinking about epistemic justification. On this conception, the difference between justification and likelihood turns out to be akin to the more widely recognised difference between ceteris paribus laws and brute statistical generalisations. I go on to discuss, in light of this suggestion, issues such as classical and lottery-driven scepticism as well as the lottery and preface paradoxes.

I want to talk about a certain epistemic quality that I call “justification,” and inquire whether that quality can ever be had “immediately” or “non-inferentially.” Before we get into substantive issues, we need first to agree about what epistemic quality it is we’ll be talking about, and then we need to clarify what it is to have that quality immediately or non-inferentially. When I say I call this epistemic quality “justification,” you’re liable to think, “Oh I know what that is.” You may. But experience has taught me that different philosophers use and understand the term “justification” differently, even before they start spinning substantive theories about what “justification” amounts to. So we should proceed cautiously. You may use the term “justification” to describe the same epistemic quality as I do; or you may use it to describe some different status or quality. You may use some other term, or no term at all, to describe the quality I call “justification.” I say that you have justification to believe P iff you’re in a position where it would be epistemically appropriate for you to believe P, a position where P is epistemically likely for you to be true. I intend this to be a very inclusive epistemic status.1 Some philosophers say you can know P without “having any justification” for your belief. We can assume that whenever a subject knows P, she’ll be in a position where it’d be epistemically appropriate to believe P. So on my usage, whoever knows P has justification to believe P. (Perhaps she has that justification because she knows.) The philosophers who say otherwise are using “having justification” to mean something different, or more specific, than the epistemic status I am using it to mean. The same goes for philosophers who say a belief can be epistemically appropriate, and so play a role in justifying other beliefs, though you do not “have any justification” for it. On my usage.

The current project of "naturalizing" epistemology has left epistemologists with a plethora of theories alleged to fall under that rubric. Recent epistemic justification theorists have seemed to want to focus on theories of epistemic justification that are more contextualized (naturalized) and less normatively global than those of the past. This paper has two central arguments: (i) that if justification is seen from a naturalized standpoint, more attention to the actual process of epistemic justification might be in order (and, hence, that the justificatory set might come to be seen more descriptively and less normatively), and (ii) that if any theory of epistemic justification were to be normatively accurate, regardless of the size of its justificatory set, then one of the requirements upon it might well be that key terms in the set would refer, in the spirit of the new scientific realism. The central thesis of the paper relies on the normative/descriptive distinction as applicable to epistemic justification theory and also relies on an intuitively plausible account of the process of epistemic justification as engaged in by an epistemic agent and skeptical challenger.

Richard Swinburne offers an original treatment of a question at the heart of epistemology: what makes a belief rational, or justified in holding? He maps the rival accounts of philosophers on epistemic justification ("internalist" and "externalist"), arguing that they are really accounts of different concepts. He distinguishes between synchronic justification (justification at a time) and diachronic justification (synchronic justification resulting from adequate investigation)--both internalist and externalist. He also argues that most kinds of justification are worth having because they are indicative of truth; however, it is only justification of internalist kinds that can guide a believer's actions. Swinburne goes on to show the usefulness of the probability calculus in elucidating how empirical evidence makes beliefs probably true.

This book proposes an original theory of epistemic justification that offers a new way to relate justification to the epistemic goal of truth-conducive belief.

Introduction As the title indicates, the chief focus of this book is epistemic justification. But just what is epistemic justification and what is its place ...