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logical constant
log·i·cal con·stant (plural log·i·cal con·stants)


noun 
Definition:
 
connective expression used in logic: a connective expression that is used in formal logic, e.g. "not," "or," "if ... then" or "if and only if"
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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