Scientists have to challenge well-known facts of one type or another every day.
The following proverb brainteasers also represent well known facts . . . You've probably used these proverbs, or at least have heard them used at some point in your life. You could write all the answers in the blocks provided, and then check the answers after you have done them all. Or you can just think of an answer in your head, and check it as you go along. If a large solid-hoofed mammal becomes available to you without compensation, refrain from casting your faculty for seeing into the oral cavity of such a creature. . . .