Cumulative Record. Chapter 9: A Case History in Scientific Method. Quote 14

I never faced a Problem which was more than the eternal problem of finding order. I never attacked a problem by constructing a Hypothesis. I never deduced Theorems or submitted them to Experimental Check. So far as I can see, I had no preconceived Model of behavior—certainly not a physiological or mentalistic one and, I believe, not a conceptual one. (p. 119)