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Rules for natural deduction: Implies introduction (DG) View |
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Intro to Logic -- Derivation rule: implication introduction (m db) View |
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V11 Introduction to Natural Deduction and the Rules of Inference (P1) (Todd “Logic Tutor” Furman) View |
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Rules for natural deduction: Disjunction (DG) View |
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Rules for natural deduction: conjunction (DG) View |
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SL 19 Natural Deduction 3—Negation Introduction and other rules (Edison Barrios) View |
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Applying Modus Tollens rule (DG) View |
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Rules for natural deduction: Double negation (DG) View |
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Logic13aDisjunctionElimination (Prof Ellis) View |
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V12 Introduction to Natural Deduction and the Rules of Inference (P2) (Todd “Logic Tutor” Furman) View |