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4 cards from this section. Quick, good the night before a test.
Define the satisfiability problem.
Focus on the meaning of 'satisfy'.
What is CNF?
Recall how clauses are structured.
What is a satisfiable proposition?
Remember the definition of satisfiability.
In CNF, what does each clause consist of?
Recall the structure of CNF.
Given the expression (p ↔ q) ∧ (¬q ∨ r), convert it to CNF and explain each step.
Sequential transformations are hand in hand with logical identities.
Create an unsatisfiable proposition and explain why it cannot be satisfied.
Review the properties of contradictions to guide your creation.
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