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: p_1. w -> s. w. p_1 -> w_2.
s can be inferred via the modus ponens rule. w_2 can be inferred via the modus ponens rule. p_1 and w can be inferred via the conjunction rule. w and p_1 can be inferred via the conjunction rule.