The second critical decision came in 1979 when it was required that every teacher gain a fifth-year Master's degree in theory and practice, paid for by the state.

The answer to these puzzles, says Gerd Gigerenzer, a German psychologist, lies in the way we make decisions, which is not how Franklin — or modern students of decision theory — think we should.

Part three is mainly contributed to the research of comprehensive decision theory and approach.