What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists x_15: T(x_15) <-> P(x_15). forall x_15: P(x_15) or ~Q_15(x_15). forall x_15: Q_4(x_15). forall x_15: Q_4(x_15) -> Q_15(x_15).
forall x_15: Q_15(x_15). forall x_15: Q_15(x_15) -> P(x_15). exists x_15: T(x_15) -> P(x_15). exists x_15: P(x_15) -> T(x_15).