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: forall x_22: P_22(x_22) or Q_22(x_22). p_1 <-> q. forall x_22: ~P_22(x_22). ~p_1.
p_1 -> q can be inferred via the biconditional elimination rule. q -> p_1 can be inferred via the biconditional elimination rule. ~q can be inferred via the biconditional elimination rule. forall x_22: Q_22(x_22) can be inferred via the universal disjunctive syllogism rule.