Like a wild card in a game of poker, an unspecified truth table entry called a “don’t care” can make our sum-of-products expressions so much nicer.
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Tarnoff, David, "Episode 6.05 – Don’t Cares, the Logical Kind" (2020). Computer Organization and Design Fundamentals Series. https://dc.etsu.edu/computer-organization-design-oer/45
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