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:

    If any proof were needed of the progress of the cause for which I have worked, it is here tonight. The presence on the stage of these college women, and in the audience of all those college girls who will some day be the nation’s greatest strength, will tell their own story to the world.
    Susan B. Anthony (1820–1906)

    A short letter to a distant friend is, in my opinion, an insult like that of a slight bow or cursory salutation—a proof of unwillingness to do much, even where there is a necessity of doing something.
    Samuel Johnson (1709–1784)

    The moment a man begins to talk about technique that’s proof that he is fresh out of ideas.
    Raymond Chandler (1888–1959)