The paper discusses the relations between two putative epistemic principles, Reflexivity and Closure, with a view to assess whether the repudiation of the former, usually required by externalistic accounts of knowledge, necessitates the repudiation, as well, of the latter. A negative reply to that question is offered, which prompts the hypothesis that alleged counterexamples to Closure are artifacts of the rather peculiar conditions on which, in the course of a particular kind of epistemological inquiry, are introduced assumptions such as are (...) characteristic of the methodological use of so-called skeptical “doubts”. (shrink)

There are many ordinary propositions we think we know. Almost every ordinary proposition entails some "lottery proposition" which we think we do not know but to which we assign a high probability of being true (for instance: “I will never be a multi-millionaire” entails “I will not win this lottery”). How is this possible - given that some closure principle is true? This problem, also known as “the Lottery puzzle”, has recently provoked a lot of discussion. In this paper I (...) discuss one of the most promising answers to the problem: Stewart Cohen’s contextualist solution which is based on ideas about the salience of chances of error. After presenting some objections to it I sketch an alternative solution which is still contextualist in spirit. (shrink)

: This paper is about the nature of practical reasons. More specifically, my primary goal is to explore when an agent has a justifying reason for action¾that is, a reason that can be used for justifying an action that has been done or that the agent is planning to do. This concept of reason is central to ethics and to practical philosophy in general. I defend an account of reason according to which a piece of practical reasoning gives an agent (...) a reason for action if he has a reason for its premises and a warrant for holding that these premises logically support the conclusion. That is roughly to say that justifying reasons are closed under logical entailment. To achieve this aim, I shall discuss the components of such reasons. Section 2 presents a principle of closure for justifying reasons and clarifies two important clauses of this principle. In the last section, I show how my account can sidestep the regress problem in practical reasoning. (shrink)