Master and Pupil

Socrates: What is a tautology?

Pupil: A tautology is a self evident statement. The truth value of a tautology is always true.

Socrates: Excellent. Can you give me an example of a tautology?

Pupil: Water is wet.

Socrates: Nice try. But you are incorrect.

Pupil: Water isn’t wet?

Socrates: Not when it’s temperature is beneath zero degrees celcius or above 100 degrees celcius.

Pupil: And my mother pays you for this?

Socrates: My hourly rate just went up.

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