exclusive/inclusive disjunction
The disjunction of two propositions, p or q, is represented in logic by pq . This is evaluated as true if both p and q are true, and is called inclusive disjunction (‘vel’). A different notion, exclusive disjunction, is defined true only when exactly one of p, q is true, and as false if they are both true. It has been contentious whether in natural language ‘or’ has an exclusive reading, or whether the appearance is the result of implicature.

Philosophy dictionary. . 2011.

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  • inclusive/exclusive disjunction — See exclusive/inclusive disjunction …   Philosophy dictionary

  • Exclusive or — The logical operation exclusive disjunction, also called exclusive or (symbolized XOR or EOR), is a type of logical disjunction on two operands that results in a value of “true” if and only if exactly one of the operands has a value of “true”. [… …   Wikipedia

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  • disjunction — noun Date: 14th century 1. a sharp cleavage ; disunion, separation < the disjunction between theory and practice > 2. a compound sentence in logic formed by joining two simple statements by or: a. inclusive …   New Collegiate Dictionary

  • Inclusive — * In the description of any formally defined set, the rules by which an object may be defined as included in the set are referred to as rules of inclusion or inclusive rules .* In the description of a mathematical set, the term inclusive denotes… …   Wikipedia

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  • logic, history of — Introduction       the history of the discipline from its origins among the ancient Greeks to the present time. Origins of logic in the West Precursors of ancient logic       There was a medieval tradition according to which the Greek philosopher …   Universalium

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