Michael Huemer

People want things, and they tend to act in such a way as to get the things they want, to the best of their ability.1 Sometimes our wants conflict with each other, so that we are forced to choose between different things that we want. When this happens, we normally choose the thing that we want more, over the thing that we want less. Behaving in this way is what we call “rational”; more specifically, it is “instrumentally rational.” Instrumental rationality consists in choosing the means that best achieves one’s goals, according to the information one has.

A central problem facing a probabilistic approach to the problem of induction is the difficulty of sufficiently constraining prior probabilities so as to yield the conclusion that induction is cogent. The Principle of Indifference, according to which alternatives are equiprobable when one has no grounds for preferring one over another, represents one way of addressing this problem; however, the Principle faces the well-known problem that multiple interpretations of it are possible, leading to incompatible conclusions. I propose a partial solution to the latter problem, drawing on the notion of explanatory priority. The resulting synthesis of Bayesian and inference-to-best-explanation approaches affords a principled defense of prior probability distributions that support induction

In The Structure of Empirical Knowledge , Laurence BonJour argues that coherence among a set of empirical beliefs can provide justification for those beliefs, in the sense of rendering them likely to be true. He also repudiates all forms of foundationalism for empirical beliefs, including what he calls "weak foundationalism" (the weakest form of foundationalism he can find). In the following, I will argue that coherence cannot provide any justification for our beliefs in the manner BonJour suggests unless some form of foundational justification is assumed. In other words, the argument that BonJour gives in favor of the thesis that coherence provides a kind of justification succeeds if and only if some beliefs have (at least weak) foundational justification.

Debunking skeptics claim that our moral beliefs are formed by processes unsuited to identifying objective facts, such as emotions inculcated by our genes and culture; therefore, they say, even if there are objective moral facts, we probably don’t know them. I argue that the debunking skeptics cannot explain the pervasive trend toward liberalization of values over human history, and that the best explanation is the realist’s: humanity is becoming increasingly liberal because liberalism is the objectively correct moral stance.

Parsimony is a virtue of empirical theories. Is it also a virtue of philosophical theories? I review four contemporary accounts of the virtue of parsimony in empirical theorizing, and consider how each might apply to two prominent appeals to parsimony in the philosophical literature, those made on behalf of physicalism and on behalf of nominalism. None of the accounts of the virtue of parsimony extends naturally to either of these philosophical cases. This suggests that in typical philosophical contexts, ontological simplicity has no evidential value.

In the practice of jury nullification, a jury votes to acquit a defendant in disregard of the factual evidence, on the grounds that a conviction would result in injustice, either because the law itself is unjust or because its application in the particular case would be unjust. The practice is widely condemned by courts, which strenuously attempt to prevent it. Nevertheless, the arguments against jury nullification are surprisingly weak. I argue that, pursuant to the general ethical duty to avoid causing unjust harms to others, jurors are often morally obligated to disregard the law. (~7400 words)

Recent results in probability theory have cast doubt on the coherence theory of justification, allegedly showing that coherence cannot produce justification for beliefs in the absence of foundational justification, and that there can be no measure of coherence on which coherence is generally truth-conducive. I argue that the coherentist can reject some of the assumptions on which these theorems depend. Coherence can then be held to produce justification on its own, and truth-conducive measures of coherence can be constructed.

The _minimal free will thesis_ (MFT) holds that at least some of the time, someone has more than one course of action that he can perform. ⁽¹⁾ This is the least that must be true in order for it to be said that there is free will. It may be disputed whether the truth of MFT is _sufficient_ for us to 'have free will,' ⁽²⁾ but there is no doubt that the main philosophical challenge to the belief in free will has come from the thesis of universal determinism, so understood as to exclude MFT. A proof of MFT is therefore of considerable philosophical interest, whether or not it constitutes a full proof of free will. In any case, it is the minimal free will thesis of which I have a proof to offer.

Michael Huemer argues that there is a tension between two principles putatively essential to Rand's ethics: the principle of egoism, which states that the only reason for doing (or not doing) anything is that it will serve (or frustrate) one's own interests; and the principle that one must not sacrifice others. Huemer considers several arguments that Rand offers for the second principle but finds that each involves either implausible empirical assumptions or assumptions that conflict with egoism. Huemer suggests that Rand may not be an egoist in the usual sense; her positions are much more consistent with the second principle.

Illegal drugs are not inherently unclean, any more than alcohol, tobacco, or canola oil. All of these are simply chemicals that people choose to ingest for enjoyment, and that can harm our health if used to excess. Most of the sordid associations we have with illegal drugs are actually the product of the drug laws: it is because of the laws that drugs are sold on the black market, that Latin American crime bosses are made rich, that government officials are corrupted, and that drug users rob others to buy drugs.

:Ideal theorists in political philosophy seek to describe a perfect political society, and to evaluate political principles by reference to their consequences in a world where everyone complies with the principles. I argue that ideal theory is not needed to set goals for practical inquiries, nor to define justice, nor to enable rankings of injustices. Nor is it useful to theorize about very different kinds of society that might occur in the far future. Ideal theory tempts us to make each of three kinds of error: it tempts us to propose norms that no specific agent can act on, to posit crazy exaggerations of moral virtues, and to place too much trust in abstract philosophical reasoning. A better approach to normative questions is to rely on analogical arguments starting from uncontroversial intuitions about concrete scenarios.

The “doctrine of the given” that Fales defends holds that there are certain experiences such that we can have justified beliefs about their “contents” that are not based on any other beliefs, and that the rest of our justified empirical beliefs rest on those “basic beliefs.” The features of experience basic beliefs are about are said to be “given.” Fales holds that some basic beliefs are infallible, having a kind of clarity that guarantees their truth to the believer. In addition, some basic beliefs are fallible, typically due to failure to devote full attention to one’s experience.

Seven proposed accounts of epistemic possibility are criticized, and a new account is proposed, making use of the notion of having justification for dismissing a proposition. The new account explains intuitions about otherwise puzzling cases, upholds plausible general principles about epistemic possibility, and explains the practical import of epistemic modality judgements. It is suggested that judgements about epistemic possibility function to assess which propositions are worthy of further inquiry.