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: W_3(g). forall y: S_3(y) <-> W_3(y).
exists x: W_3(x) can be inferred via the existential generalization rule. forall y: S_3(y) -> W_3(y) can be inferred via the universal biconditional elimination rule. forall y: W_3(y) -> S_3(y) can be inferred via the universal biconditional elimination rule.