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Abstract
This paper introduces a novel normal form, the Prime Normal Form, to decide the satisfiability of a 3CNF formula. The PNF of a formula contains its prime truth assignments. A 3CNF formula is satisfiable iff its PNF is reducible.
I have completely re-written the abstract. The proof of the satisfiability/reducibility theorem is more rigorous in the revised paper. I have re-written the reducibility procedure. In general, the revised paper is better-written.