A common joke among mathematicians. Two mathematicians are working on a problem and one makes a claim to which the other replies, "That's trivial!" The pair st

A common joke among mathematicians. Two mathematicians are working on a problem and one makes a claim to which the other replies, "That's trivial!" The pair stare at the claim for ten minutes. The other says, "Is it trivial?" They go home, think about it all night, publish three papers about it over the next two years, and then they agree, "Yes, it's trivial."