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 <-> w. p or p_3. p_3 <-> w.
p -> w can be inferred via the biconditional elimination rule. p_3 -> w can be inferred via the biconditional elimination rule. w -> p can be inferred via the biconditional elimination rule. w -> p_3 can be inferred via the biconditional elimination rule.