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:
“There are some persons in this world, who, unable to give better proof of being wise, take a strange delight in showing what they think they have sagaciously read in mankind by uncharitable suspicions of them.”
—Herman Melville (18191891)
“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.”
—Andrew Michael Ramsay (16861743)
“It comes to pass oft that a terrible oath, with a swaggering accent sharply twanged off, gives manhood more approbation than ever proof itself would have earned him.”
—William Shakespeare (15641616)