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: q_6 -> Q(a). forall y: R_3(y) -> Q(y). R_3(a) or q_6. p_15. p_15 -> q_3.
q_3 can be inferred via the modus ponens rule.