(January 11, 2015 at 3:21 pm)robvalue Wrote: Can we test for any of these things? Are they just abstract concepts?As I said in previous posts, not all forms of knowledge are testable according to the methods used by natural science. The subjects of natural science and the methods used to investigate them operate against a deeper philosophical background.
Secondly, I object to the word 'just'. Your question tacitly assumes a form conceptualism with respect to immaterial objects. In contrast to this I take a realist position that avoids the contradictions and paradoxes of conceptualism.