I'm studying William James. I'm mainly interested in his Radical Empiricism and Pluralism. I really like his views but I need some clarification on what is his position on conceptions that are not clearly related to perceptions.
For example consider the creation of the imaginary numbers. I cannot see how these can be abstracted from perceptions. Can someone point me to paragraphs of James on this?
In my understanding abstract constructions like the imaginary numbers are internal experiences that don't need to be related to natural phenomena. The imaginary numbers were not needed in science until quantum mechanics and, of course, were created before our experiences with subatomic phenomena.