What is Logic? #82: The Deduction Theorem for Propositional Logic
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7:48
What is Logic? #83: The Soundness Theorem for Propositional Logic
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9:51
The Deduction Theorem | MetaLogic | Attic Philosophy
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15:00
What is Logic? #71: More Propositional Proofs!
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28:33
Terence Tao on how we measure the cosmos (part 1)
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8:54
Germany’s Far-Right Comeback | NYT Opinion
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13:48
How To Learn Any Skill So Fast It Feels Illegal
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9:57
Soundness and Completeness Tutorial | Attic Philosophy
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8:48