What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: forall x_17: ~T(x_17). forall x_17: T(x_17) or P(x_17). forall x_17: S_4(x_17) -> R_1(x_17). forall x_17: R_1(x_17) -> S_4(x_17). exists x_17: R_1(x_17) -> ~P(x_17).
forall x_17: P(x_17) can be inferred via the universal disjunctive syllogism rule. forall x_17: S_4(x_17) <-> R_1(x_17) can be inferred via the universal biconditional introduction rule. forall x_17: R_1(x_17) <-> S_4(x_17) can be inferred via the universal biconditional introduction rule.