How long is a piece of string?

Many people have asked this and many have no answer. So here is my attempt. The next time someone asks you "how long is a piece of string?" hit them with "double the length from one side to the middle!". Might keep them quiet for a while

one side to the middle?

Sorry, but that's the width.

Try "one end to the middle" next time.

EH? Let's not get bogged down with technicalities shall we?