Disjunctive Syllogism - Proof

Proof

Proposition Derivation
Given
Given
Material implication
Modus ponens
Proposition Derivation
Given
Given
Material implication
Transposition
Modus ponens

Read more about this topic:  Disjunctive Syllogism

Famous quotes containing the word proof:

    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 (1564–1616)

    The thing with Catholicism, the same as all religions, is that it teaches what should be, which seems rather incorrect. This is “what should be.” Now, if you’re taught to live up to a “what should be” that never existed—only an occult superstition, no proof of this “should be”Mthen you can sit on a jury and indict easily, you can cast the first stone, you can burn Adolf Eichmann, like that!
    Lenny Bruce (1925–1966)

    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 (1819–1891)