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  2. Contraposition - Wikipedia

    en.wikipedia.org/wiki/Contraposition

    If a statement's inverse is false, then its converse is false (and vice versa). If a statement's negation is false, then the statement is true (and vice versa). If a statement (or its contrapositive) and the inverse (or the converse) are both true or both false, then it is known as a logical biconditional.

  3. Inverse (logic) - Wikipedia

    en.wikipedia.org/wiki/Inverse_(logic)

    The inverse and the converse of a conditional are logically equivalent to each other, just as the conditional and its contrapositive are logically equivalent to each other. [1] But the inverse of a conditional cannot be inferred from the conditional itself (e.g., the conditional might be true while its inverse might be false [2]). For example ...

  4. Converse (logic) - Wikipedia

    en.wikipedia.org/wiki/Converse_(logic)

    Let S be a statement of the form P implies Q (P → Q). Then the converse of S is the statement Q implies P (Q → P). In general, the truth of S says nothing about the truth of its converse, [2] unless the antecedent P and the consequent Q are logically equivalent. For example, consider the true statement "If I am a human, then I am mortal."

  5. Affirming the consequent - Wikipedia

    en.wikipedia.org/wiki/Affirming_the_consequent

    In propositional logic, affirming the consequent (also known as converse error, fallacy of the converse, or confusion of necessity and sufficiency) is a formal fallacy (or an invalid form of argument) that is committed when, in the context of an indicative conditional statement, it is stated that because the consequent is true, therefore the ...

  6. Glossary of logic - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_logic

    A proposition that asserts the truth of a statement, as opposed to negating it. [7] [8] [9] affirming the consequent A logical fallacy in which a conditional statement is incorrectly used to infer its converse. For example, from "If P then Q" and "Q", concluding "P". alethic modal logic

  7. GOP report: Liz Cheney should be investigated by FBI ... - AOL

    www.aol.com/gop-report-liz-cheney-investigated...

    In a statement first reported by The Hill responding to Trump's jail threat, Cheney focused on Trump's role in the Jan. 6 storming of the Capitol, not her own defense.

  8. Immediate inference - Wikipedia

    en.wikipedia.org/wiki/Immediate_inference

    Given a type A statement, "All S are P.", one can make the immediate inference that "All non-P are non-S" which is the contrapositive of the given statement. Given a type O statement, "Some S are not P.", one can make the immediate inference that "Some non-P are not non-S" which is the contrapositive of the given statement.

  9. Missing photographer Hannah Kobayashi possibly caught up in ...

    www.aol.com/missing-photographer-hannah...

    Missing photographer Hannah Kobayashi may have been intertwined in an alleged marriage scam with an Argentinian national before her disappearance, according to a shocking report.. Kobayashi, 30 ...