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Propositional formula
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==== Create the formula's Karnaugh map ==== [[File:Propositional formula maps 2.png|400px|thumb|right| Steps in the reduction using a Karnaugh map. The final result is the OR (logical "sum") of the three reduced terms.]] Use the values of the formula (e.g. "p") found by the truth-table method and place them in their into their respective (associated) Karnaugh squares (these are numbered per the Gray code convention). If values of "d" for "don't care" appear in the table, this adds flexibility during the reduction phase.
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