Disjunction Elimination - Proof

Proof

Proposition Derivation
Given
Given
Given
Material implication
Hypothetical syllogism
Conjunction
Law of Excluded Middle
Constructive dilemma
Tautology

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    The source of Pyrrhonism comes from failing to distinguish between a demonstration, a proof and a probability. A demonstration supposes that the contradictory idea is impossible; a proof of fact is where all the reasons lead to belief, without there being any pretext for doubt; a probability is where the reasons for belief are stronger than those for doubting.
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