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: ~P(j_2). forall y_4: Q_1(y_4) <-> P(y_4). P(j_2) -> Q_1(j_2).
forall y_4: Q_1(y_4) -> P(y_4) can be inferred via the universal biconditional elimination rule. forall y_4: P(y_4) -> Q_1(y_4) can be inferred via the universal biconditional elimination rule.