What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall y: T_3(y) <-> R(y). forall y: P(y) -> T_3(y). exists y: R(y) <-> P(y).
forall y: T_3(y) -> R(y). exists y: R(y) -> P(y). forall y: R(y) -> T_3(y). exists y: P(y) -> R(y).