What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? t -> q_1. forall x: Q_1(x) <-> Q(x). q_1 -> Q(f). ~Q_1(f).
t -> Q(f). forall x: Q_1(x) -> Q(x). forall x: Q(x) -> Q_1(x).