Exercise logic.propositional.consequence
Description
Prove that formula is a logical consequence of a set of formulas
Firsts
Rule logic.propositional.notnot Location [0,0,1,0] Term "Just (TList [TList [TCon logic1.or [TCon logic1.and [TCon logic1.not [TVar \"r\"],TVar \"q\"],TCon logic1.and [TVar \"r\",TCon logic1.not [TVar \"q\"]]]],TCon logic1.implies [TVar \"p\",TCon logic1.or [TVar \"q\",TVar \"r\"]]])" Focus "Just (TVar \"r\")" Environment