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 <-> q_8. w_4. w_4 -> p.
p can be inferred via the modus ponens rule. p -> q_8 can be inferred via the biconditional elimination rule. q_8 -> p can be inferred via the biconditional elimination rule.