A description of the Operation in Categorical Logic known as Contraposition (90 Second Philosophy & 100 Days of Logic).

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A description of the Categorical Operator known as Conversion (100 Days of Logic & 90 Second Philosophy).

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A description of the Associative Property of Disjunction and Conjunction in Propositional Logic (90 Second Philosophy and 100 Days of Logic).

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A description of De Morgan’s Rule of Replacement in Propositional Logic

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Questions to solve using the first 8 rules of inference, and their answers (90 Second Philosophy and 100 Days of Logic).

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A description of the “Simplification” Rule of Implication (90 Second Philosophy and 100 Days of Logic).

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An explanation of and justification for the Rule of Implication “Conjunction” (90 Second Philosophy and 100 Days of Logic).

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An explication of the Rule of Implication known as Modus Ponens in Propositional Logic (90 Second Philosophy and 100 Days of Logic).

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An explanation of the Rule of Implication referred to as Disjunctive Syllogism in Propositional Logic (90 Second Philosophy and 100 Days of Logic).

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A description of the Inconsistent relationship between two propositions.

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