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3 Natural Deduction: The Reductio Ad Absurdum Rule (logicman) View |
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SL 19 Natural Deduction 3—Negation Introduction and other rules (Edison Barrios) View |
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You're doing Natural Deduction wrong! (Attic Philosophy) View |
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Rules for Natural Deduction | Attic Philosophy (Attic Philosophy) View |
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Intro to Logic: Sample derivation - double negation using Reductio ad Absurdum (RAA) (m db) View |
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Natural Deductive Logic: RULES #2 (vI, vE, DN, RAA) (TrevTutor) View |
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Two practice exercises in Natural Deductive Logic: RULES #3 (=I, =E) - Logic (TrevTutor) View |
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Natural Deduction Proofs: practise examples | Attic Philosophy (Attic Philosophy) View |
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Intro to Logic - Reductio Ad Absurdum (Jessica Katz) View |
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Reductio ad Absurdum (Daniel Yeakel) View |