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_6 -> r_2. r_2 -> t. p_6 or w. r_2 <-> w.
p_6 -> t can be inferred via the transitivity rule. r_2 -> w can be inferred via the biconditional elimination rule. w -> r_2 can be inferred via the biconditional elimination rule.