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: ~t. ~p. p or s. p_26 <-> t. ~p_26 -> w_2.
s can be inferred via the disjunctive syllogism rule. ~t and ~p can be inferred via the conjunction rule. ~p and ~t can be inferred via the conjunction rule. p_26 -> t can be inferred via the biconditional elimination rule. t -> p_26 can be inferred via the biconditional elimination rule. ~p_26 can be inferred via the biconditional elimination rule.