Some years ago, there were some books published on the subject of "imponderables;" simple questions that have no easy anwers, unless you have special knowledge of the particular question (they were published pre-internet, or when the internet was in its infancy). So, here are a couple from one of the books:

1. When do flies sleep?
2. If nothing sticks to Teflon, how do they get Teflon to stick to the pan?

Someone answered the Teflon question in the Hijack a Thread discussion! It prompted me to start this thread.

So, 'catters and guests, any imponderables of your own to post?

Chanteyranger