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_26: P(x_26) or U(x_26). forall x_26: P(x_26) -> T(x_26). forall x_26: U(x_26) -> T(x_26). p_18 and q_1. forall x_26: T(x_26) -> S_2(x_26).
p_18 can be inferred via the simplification rule. q_1 can be inferred via the simplification rule. forall x_26: P(x_26) -> S_2(x_26) can be inferred via the universal transitivity rule. forall x_26: U(x_26) -> S_2(x_26) can be inferred via the universal transitivity rule. forall x_26: T(x_26) can be inferred via the universal disjunction elimination rule.