What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall y_2: T_2(y_2) -> P_2(y_2). forall y_2: P_2(y_2) -> P(y_2). exists y_2: T_2(y_2). forall y_2: P(y_2) -> P_2(y_2).
exists y_2: P_2(y_2). forall y_2: T_2(y_2) -> P(y_2). forall y_2: P_2(y_2) <-> P(y_2). forall y_2: P(y_2) <-> P_2(y_2).