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: ~R_12(a_12). p_4. forall x_12: R_12(x_12) or S_12(x_12).
~R_12(a_12) and p_4 can be inferred via the conjunction rule. p_4 and ~R_12(a_12) can be inferred via the conjunction rule.