Reminded me of this math joke:

A physicist, engineer, and mathematician are asked by a local farmer to build the smallest fence they possibly can to hold in all of his sheep.

The physicist builds a big fence and slowly reduces the size until he can’t reduce the fence any longer.

The engineer measures each sheep, stacks them in a specific way, and then builds a fence around them.

The mathematician builds a small fence around himself, then defines himself to be outside the fence.