What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: forall x: W_1(x) <-> P(x). forall x: ~P(x) or R_2(x). forall x: W_1(x).
forall x: W_1(x) -> P(x) can be inferred via the universal biconditional elimination rule. forall x: P(x) -> W_1(x) can be inferred via the universal biconditional elimination rule.