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contraposition ne demek?

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In logic, contraposition is a law, which says that a conditional statement is logically equivalent to its contrapositive. The
Kaynak: Contraposition

In traditional logic , contraposition is a form of immediate inference in which from a given proposition another is inferred having for
Kaynak: Contraposition (traditional logic)

Transposition and the method of contraposition: applied to categorical propositions through contraposition and obversion a series of
Kaynak: Transposition (logic)

In other words, to prove by contraposition that P Rightarrow Q, prove that lnot Q Rightarrow lnot P. Any proof by contrapositive can
Kaynak: Proof by contrapositive

For example, in intuitionistic logic which rejects proofs by contraposition as valid rules of inference, (p → q) ⇒ ¬p ∨ q is not a
Kaynak: Material conditional

Contraposition: Contraposition (traditional logic) immediate inference that "All non-P are non-S" which is the contraposition of the given statement.
Kaynak: Immediate inference

contraposition fails. A semantic interpretation of conditional quantifiers involves a relation between sets of subsets of a given structure—
Kaynak: Conditional quantifier

In strict logic al terms, via contraposition , this statement is equivalent to. (2) Everything that is not black is not a raven.
Kaynak: Raven paradox

Popular rules of inference include modus ponens, modus tollens from propositional logic and contraposition . First-order predicate logic
Kaynak: Rule of inference

We want to show: If G implies A, then G proves A. We proceed by contraposition : We show instead that if G does not prove A then G does not
Kaynak: Propositional calculus

Syntactically, (1) and (2) are derivable from each other via the rules of contraposition and double negation . Semantically, (1) and (2)
Kaynak: Logical equivalence

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