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: w <-> u_4. ~w. forall x: P(x).
w -> u_4 can be inferred via the biconditional elimination rule. u_4 -> w can be inferred via the biconditional elimination rule. ~u_4 can be inferred via the biconditional elimination rule.