You reminded me of this old joke: > Two economists walk down a road and they see a twenty dollar bill lying on the side-walk. One of them asks “is that a twent

You reminded me of this old joke: > Two economists walk down a road and they see a twenty dollar bill lying on the side-walk. One of them asks “is that a twenty dollar bill?” Then the other one answers “It can’t be, because someone would have picked it up already,” and they keep walking.