ABSTRACT
In keeping with my professional background in philosophy, I do not comment on matters of biological detail here. Instead, I call for clarifications of argument on several points in these chapters, while confining my more constructive comments to general epistemological and metaphysical aspects of these chapters. Specifically, I make an effort in a number of places to call attention to the relevance of contemporary philosophical pragmatism, particularly the work of W.V. Quine, to these discussions.
