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  2. If and only if - Wikipedia

    en.wikipedia.org/wiki/If_and_only_if

    The biconditional is true in two cases, where either both statements are true or both are false. The connective is biconditional (a statement of material equivalence), [2] and can be likened to the standard material conditional ("only if", equal to "if ... then") combined with its reverse ("if"); hence the name. The result is that the truth of ...

  3. Truth table - Wikipedia

    en.wikipedia.org/wiki/Truth_table

    A truth table has one column for each input variable (for example, A and B), and one final column showing all of the possible results of the logical operation that the table represents (for example, A XOR B). Each row of the truth table contains one possible configuration of the input variables (for instance, A=true, B=false), and the result of ...

  4. Template:2-ary truth table/doc - Wikipedia

    en.wikipedia.org/wiki/Template:2-ary_truth_table/doc

    This is a documentation subpage for Template:2-ary truth table. It may contain usage information, categories and other content that is not part of the original template page. This template uses Lua :

  5. Logical biconditional - Wikipedia

    en.wikipedia.org/wiki/Logical_biconditional

    Venn diagram of (true part in red) In logic and mathematics, the logical biconditional, also known as material biconditional or equivalence or bidirectional implication or biimplication or bientailment, is the logical connective used to conjoin two statements and to form the statement "if and only if" (often abbreviated as "iff " [1]), where is known as the antecedent, and the consequent.

  6. List of rules of inference - Wikipedia

    en.wikipedia.org/wiki/List_of_rules_of_inference

    The column-11 operator (IF/THEN), shows Modus ponens rule: when p→q=T and p=T only one line of the truth table (the first) satisfies these two conditions. On this line, q is also true. Therefore, whenever p → q is true and p is true, q must also be true.

  7. Template:2-ary truth table; implications - Wikipedia

    en.wikipedia.org/wiki/Template:2-ary_truth_table;...

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  8. Template:2-ary truth table - Wikipedia

    en.wikipedia.org/wiki/Template:2-ary_truth_table

    This template is for articles like Exclusive or. The colors white and red correspond to Venn diagrams like File:Venn0110.svg , as well as other files like File:Variadic logical XOR.svg . {{ 2-ary truth table | 0 | 1 | 1 | 0 |< math > A \oplus B </ math >}}

  9. Truth function - Wikipedia

    en.wikipedia.org/wiki/Truth_function

    In logic, a truth function [1] is a function that accepts truth values as input and produces a unique truth value as output. In other words: the input and output of a truth function are all truth values; a truth function will always output exactly one truth value, and inputting the same truth value(s) will always output the same truth value.