– What are you chewing on?
– I’m chewing on a special type of gum; the more I chew, the smarter I become.
– Let me try it!
– There’s only one piece left. I’ll sell it to you for 10 dollars, how about that?
– Deal! I’ll buy it!
– So? Do you feel smarter yet?
– … Oh! It seems I’ve fallen into your trap…?
– See? You’ve already started to get smarter!