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:
“a meek humble Man of modest sense,
Who preaching peace does practice continence;
Whose pious lifes a proof he does believe,
Mysterious truths, which no Man can conceive.”
—John Wilmot, 2d Earl Of Rochester (16471680)
“From whichever angle one looks at it, the application of racial theories remains a striking proof of the lowered demands of public opinion upon the purity of critical judgment.”
—Johan Huizinga (18721945)
“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 (19081992)