What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? p_6 or R_19(a_19). forall x_19: R_19(x_19) -> S_19(x_19). S_19(a_19) -> q. p -> ~q. p_6 -> q.
R_1(a_19) -> p_6.