How we know

1) What is science?; 2) Facts; 3) Snow on cholera; 4) Is heat a substance?; 5) Who is mad?; 6) Science - search for understanding; 7) Science - the goal of generality; 8) Science - the experimental test; 9) The experimenter and the experiment; 10) Measurement and its pitfalls; 11) Where do hypotheses come from?; 12) The dispassionate scientist; 13) The cultural roots of science; 14) Logic and mathematics; 15) Probability; 16) Statistics.