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