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Propositional formula
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=== Propositional variables === The simplest type of propositional formula is a '''[[propositional variable]]'''. Propositions that are simple ([[atomic formula|atomic]]), symbolic expressions are often denoted by variables named ''p'', ''q'', or ''P'', ''Q'', etc. A propositional variable is intended to represent an atomic proposition (assertion), such as "It is Saturday" = ''p'' (here the symbol = means " ... is assigned the variable named ...") or "I only go to the movies on Monday" = ''q''.
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