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Boolean algebra provides a systematic method for simplifying and proving logical expressions used in digital and analog circuits and instrumentation. The validity of Boolean identities can be established by applying fundamental laws and theorems. For the first identity, ((A + \overline{A}) = 1). According to the complement law of Boolean algebra, a variable ORed with its complement always results in logic __________ ____ ______ ____ ___ ___ _______ ________ __________ _____.
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