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  2. Converse (logic) - Wikipedia

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

    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."

  3. 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 ...

  4. Converse relation - Wikipedia

    en.wikipedia.org/wiki/Converse_relation

    In the monoid of binary endorelations on a set (with the binary operation on relations being the composition of relations), the converse relation does not satisfy the definition of an inverse from group theory, that is, if is an arbitrary relation on , then does not equal the identity relation on in general.

  5. Converse - Wikipedia

    en.wikipedia.org/wiki/Converse

    Converse (logic), the result of reversing the two parts of a definite or implicational statement Converse implication, the converse of a material implication; Converse nonimplication, a logical connective which is the negation of the converse implication; Converse (semantics), pairs of words that refer to a relationship from opposite points of view

  6. Talk:Converse (logic) - Wikipedia

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

    What is the scope and the range of "converse"? Another example is "contrapositive", or "contraposition". As a process within logic it is limited to traditional logic and requires a reasoning process involving obversion, conversion, and obversion again. But in truth functional logic this type of inference is replaced with the rule of transposition.

  7. Glossary of logic - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_logic

    An area of algebra in which the values of the variables are the truth values true and false, typically used in computer science, logic, and mathematical logic. Boolean negation A form of negation where the negation of a non-true proposition is true, and the negation of a non-false proposition is false. [34] [35] [36] Boolean operator

  8. Transpose graph - Wikipedia

    en.wikipedia.org/wiki/Transpose_graph

    The name converse arises because the reversal of arrows corresponds to taking the converse of an implication in logic. The name transpose is because the adjacency matrix of the transpose directed graph is the transpose of the adjacency matrix of the original directed graph.

  9. Logical truth - Wikipedia

    en.wikipedia.org/wiki/Logical_truth

    Logical truths are thought to be the simplest case of statements which are analytically true (or in other words, true by definition). All of philosophical logic can be thought of as providing accounts of the nature of logical truth, as well as logical consequence. [1] Logical truths are generally considered to be necessarily true. This is to ...