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_3 -> ~q_14. t or q_6. q_14. ~t.
~q_3 can be inferred via the modus tollens rule. q_6 can be inferred via the disjunctive syllogism rule. q_14 and ~t can be inferred via the conjunction rule. ~t and q_14 can be inferred via the conjunction rule.