Abstract

We analyze, along the lines of the knowledge compilation map, both the tractability and the succinctness of the propositional language URC-C of unit-refutation complete propositional formulae, as well as its disjunctive closure URC-C[OR; EXISTS], and a superset of URC-C where variables can be existentially quantified and unit-refutation completeness concerns only consequences built up from free variables.

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