Surely at least some of our logical principles … are far more evident and obvious to us than are any of the empirical generalizations we find in psychology, or in any other of the empirical sciences. Thus, to attempt to explain logic in terms of psychology is to explain the more certain by the less certain. It is, in short, to commit the fallacy of obscurum per obscurius.

p. 24 - Challenging Postmodernism (2003)