Evan Fales

Essentialism--understood as the doctrine that there are natural kinds--can be sustained with respect to the most fundamental physical entities of the world, as I elsewhere argue. In this paper I take up the question of the existence of natural kinds among complex structures built out of these elementary ones. I consider a number of objections to essentialism, in particular Locke's puzzle about the existence of borderline cases. A number of recent attempts to justify biological taxonomy are critically examined. I conclude that theory partially justifies such taxonomies but supports only a weaker form of essentialism

This critical study of the third book of Plantinga's trilogy on proper-function epistemology begins by denying that classical foundationalism proposes a deontic conception of justification. Nor is it subject to Gettier counterexamples, as, I show, Plantinga's fallibilism is and must be. Plantinga's central thesis is that there's no way of attacking the rationality of central Christian beliefs without attacking their truth. That, I argue, is not so on several grounds, e.g., because one can demand independent evidence for the existence of the _sensus divinitatis and Holy Spirit, because of doctrinal disagreements, and because of the morally checkered character of "saved" Christians

Jerome Gellman has recently disputed my claim that a naturalistic explanation for mystical experiences is available, a better explanation than any current attempt to show that God is sometimes perceived in those experiences. Gellman argues (i) that some mystics do not 'fit' the sociological explanation of I. M. Lewis; (ii) that the sociological analysis of tribal mysticism cannot properly be extended to theistic experiences; and (iii) that mystical experiences merit prima facie credence, so the burden of proof falls on the naturalist. I reply (i) that the alleged counter-examples either do fit Lewis's explanation or are too poorly known to judge; (ii) that Lewis's theory, supplemented by recent neurophysiological findings, provides a strong explanation for all mystical experiences; and (iii) that the burden of proof, if there is one, now falls on the theist

Theoretical simplicity is difficult to characterize, and evidently can depend upon a number of distinct factors. One such desirable characteristic is that the laws of a theory have relatively few "counterinstances" whose accommodation requires the invocation of a ceteris paribus condition and ancillary explanation. It is argued that, when one theory is reduced to another, such that the laws of the second govern the behavior of the parts of the entities in the domain of the first, there is a characteristic gain in simplicity of the sort mentioned: while I see no way of quantitatively measuring the "amount" of defeasibility of the laws of a theory, microreduction can be shown to decrease that "amount."