Two men went out fishing one fine day in a rented boat. They caught an amazing 42 fish. “Let’s come out again tomorrow but be sure to mark this great fishing spot on the lake” said one of the men to the other. The following day, they are on the way to pick up the boat and the same man asks, “Did you remember to mark that great fishing spot?” The other man replied, “Yes, I put a massive ‘X’ underneath the boat.” “You silly fool” said the first guy, “What happens if we are given a different boat today!?” ​