Combining Philosophers
Ideas for Alfred Tarski, Robert S. Wolf and Max Horkheimer
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5 ideas
5. Theory of Logic / A. Overview of Logic / 3. Value of Logic
10152
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Set theory and logic are fairy tales, but still worth studying [Tarski]
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5. Theory of Logic / A. Overview of Logic / 4. Pure Logic
10048
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There is no clear boundary between the logical and the non-logical [Tarski]
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5. Theory of Logic / A. Overview of Logic / 5. First-Order Logic
13534
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In first-order logic syntactic and semantic consequence (|- and |=) nicely coincide [Wolf,RS]
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13535
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First-order logic is weakly complete (valid sentences are provable); we can't prove every sentence or its negation [Wolf,RS]
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5. Theory of Logic / A. Overview of Logic / 6. Classical Logic
13337
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A language: primitive terms, then definition rules, then sentences, then axioms, and finally inference rules [Tarski]
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