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Logic and Proof

3 sessions, in order

Three sessions on how you prove something is true without ever directly seeing it. Proving a claim false by assuming it's true and watching it break. Figuring out a hidden fact from indirect clues alone. And the ancient argument that motion itself is impossible, plus the actual, satisfying reason it's wrong.

1.MATH-7What Is the Biggest Number?Math~17 minIs there a biggest number? How mathematicians prove something false by assuming it's true and finding a contradiction.
2.LOGIC-7The Barber Shop MysteryLogic~31 minCan you figure out who did it without seeing it happen? Inference from indirect evidence.
3.LOGIC-9The Wall You Can Never TouchLogic~36 minCan you add up infinitely many numbers and still get a normal answer? The ancient 'motion is impossible' paradox and how it's resolved.