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A propositional variable is a symbol that represents a simple, unanalyzed proposition in logic. These variables, often represented by letters like 'p' or 'q', can take on a truth value of either true or false. They are the basic building blocks in propositional calculus, a system used to analyze compound propositions formed by logical connectives such as AND, OR, and NOT. Boolean algebra, which uses these concepts, is fundamental to the design of digital computers.1234

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