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Introduction to the Nature of Proof (1 of 3: Prologue)

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Proof by Contradiction | Explanation + 5 Examples

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Proof by Contradiction (1 of 2: How does it work?)

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Infinite Primes - Numberphile

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Proof by Contradiction: log₂5 is irrational

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Sum of first n cubes - Mathematical Induction

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Euclid's proof that there are infinitely many primes! Classic math proof!