What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists x: P_2(x) or T_2(x). forall x: T_2(x) -> U_2(x). forall x: P_2(x) -> U_2(x). forall x: U_2(x) -> P_2(x).
forall x: T_2(x) -> P_2(x). exists x: U_2(x). forall x: P_2(x) <-> U_2(x). forall x: U_2(x) <-> P_2(x).