I’ve been thinking a lot about the seventh chapter in a splendid book called The Ancients and the Moderns, by a fascinating Boston University professor named Stanley Rosen. I read the book over two years ago, but the ideas of this chapter have since continued to percolate in my brain.

Rosen argues that we need to see a much closer association between two fields of study often thought separate: logic and psychology. At first glance, the two might seem to have little in particular to do with one another. Logic concerns itself with the proper formal relationships between statements in arguments; psychology, with the empirical investigation of mind and behaviour.

But more basically, what are logic and psychology? Both, really, are the study of thought. Continue reading →