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
Optimist: The cup is half full
Pessimist: The cup is half empty
Cosmologist: The cup is dusty or full of gravitational waves

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