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A Crash Course in Formal Logic Pt 8b: Natural Deduction in Propositional Logic

A Crash Course in Formal Logic Pt. 1

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A Crash Course in Formal Logic Pt 6c: Rules for Categorical Syllogisms

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A Crash Course in Formal Logic Pt 7a: Propositional Logic, Symbols and Functions

A Crash Course in Formal Logic Pt 7c: Truth Tables for Arguments

A Crash Course in Formal Logic Pt 6b: Venn Diagrams

A Crash Course in Formal Logic Pt 4d: Fallacies of Presumption, Ambiguity and Grammatical Analogy

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Logical Arguments - Modus Ponens & Modus Tollens

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8.1 Predicate Logic: Symbols & Translation