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_2 or w. r_6 <-> p_2. p or ~w. s_1 -> r_6. p -> s_1.
p -> r_6 can be inferred via the transitivity rule. w -> p can be inferred via the rewriting rule. r_6 -> p_2 can be inferred via the biconditional elimination rule. p_2 -> r_6 can be inferred via the biconditional elimination rule.