A fool with the mind of a detective is an intelligent fool, a logical fool, the worst kind, because men's logic, far from compensating for their foolishness, only duplicates it, triplicates it, makes it dangerous.
Un imbécil detectivesco es un imbécil listo, un imbécil lógico, los peores, porque la lógica de los hombres, en vez de compensar su imbecilidad, la duplica y la triplica y la hace ofensiva.
Original text (Spanish)
Notes from Wikiquote
p. 30