Optimist: The cup is half full Pessimist: The cup is half empty Historian: The cup can teach you a lot of things that you do not want to know
Optimist: The cup is half full Pessimist: The cup is half empty Science Fiction Writer: The cup is a crystalline super computer and the liquid is hyperintelligent, they want to know why humanity should be allowed to exist, you have 30 minutes to respond and the answer must be danced by a cat