Mark T. Nelson

According to the cosmological argument, there must be a self-existent being, because, if every being were a dependent being, we would lack an explanation of the fact that there are any dependent beings at all, rather than nothing. This argument faces an important, but little-noticed objection: If self-existent beings may exist, why may not also self-explanatory facts also exist? And if self-explanatory facts may exist, why may not the fact that there are any dependent beings be a self-explanatory fact? And if that fact is self-explanatory, why make recourse to self-existent beings? This line of questioning is surprisingly hard to answer, but I find resources for an answer in Bertrand Russell's logical atomism.

The Clarke/Rowe version of the Cosmological Argument is sound only if the Principle of Sufficient Reason (PSR) is true, but many philosophers, including Rowe, think that there is not adequate evidence for the principle of sufficient reason. I argue that there may be indirect evidence for PSR on the grounds that if we do not accept it, we lose our best justification for an important principle of metaethics, namely, the Principle of Universalizability. To show this, I argue that all the other justifications of the Principle of Universalizability on offer, including Richard Hare's, are inadequate

Walter Sinnott-Armstrong’s recent defence of moral scepticism raises the debate to a new level, but I argue that it is unsatisfactory because of problems with its assumption of global scepticism, with its use of the Sceptical Hypothesis Argument, and with its use of the idea of contrast classes and the correlative distinction between ‘everyday’ justification and ‘philosophical’ justification. I draw on Chisholm’s treatment of the Problem of the Criterion to show that my claim that I know that, e.g., baby-torture is wrong, is no more question-begging than Sinnott-Armstrong’s denial that I know this.