There are a few trees in a garden. On one of them, a pear tree, there are pears (quite logical). But after a strong wind blew, there were neither pears on the tree nor on the ground.
There were only 2 pears in the tree. After the strong wind blew, one tree fell to the ground so that leaves one pear on the tree. Logically, there are neither pears on the tree nor on the ground.