What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? q_1. ~P(g). forall y: P(y) <-> P_4(y).
q_1 and ~P(g). ~P(g) and q_1. forall y: P(y) -> P_4(y). forall y: P_4(y) -> P(y).