September 26, 2018 / Last updated : September 25, 2018 B. F. Skinner Foundation Skinner's Quote of the Day Contingencies of Reinforcement. Chapter 9: The inside story. Quote 16 “Man is a machine, but he is a very complex one. At present he is far beyond the powers of men to construct—except, of course, in the usual biological way.” (p. 294) Subscribe to RSS feed here