Disjunction Elimination - Proof

Proof

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

Read more about this topic:  Disjunction Elimination

Famous quotes containing the word proof:

    O, popular applause! what heart of man
    Is proof against thy sweet, seducing charms?
    William Cowper (1731–1800)

    a meek humble Man of modest sense,
    Who preaching peace does practice continence;
    Whose pious life’s a proof he does believe,
    Mysterious truths, which no Man can conceive.
    John Wilmot, 2d Earl Of Rochester (1647–1680)

    War is a beastly business, it is true, but one proof we are human is our ability to learn, even from it, how better to exist.
    M.F.K. Fisher (1908–1992)