Scientific Method

"Uma das coisas maravilhosas da ciência é que, quando os cientistas não sabem algo, podem avançar com qualquer teoria e conjectura e, no fim, simplesmente reconhecer a sua ignorância."
Yuval Noah Harari, Homo-Deus

"Science alone of all the subjects contains within itself the lesson of the danger of belief in the infallibility of the greatest teachers in the preceeding generation . . .As a matter of fact, I can also define science another way: Science is the belief in the ignorance of experts."
Richard Feynman, The Pleasure of Finding Things Outas quoted in American Scientist v. 87, p. 462 (1999).