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_7 <-> w. s_4 -> p_7. ~t or s_4. t or w.
w or s_4 can be inferred via the resolution rule. p_7 -> w can be inferred via the biconditional elimination rule. w -> p_7 can be inferred via the biconditional elimination rule.