Gigerenzer (2007) thinks human mind is not rational, that is to say, it does not work following prescriptions of formal logic. To demonstrate it, Gigerenzer (2007) presents everyday reasoning examples in common people. In this paper, we checked an example presented by Gigerenzer (2007) in this way, we analyzed it and we found two conclusions: i) It does not prove that human mind is irrational and ii) it shows that contents selection is an important aspect in pedagogical practice, and that this selection can generate, if it is not done correctly, excludable conceptions about some realities in students.
contents; exclusion; logic; rationality