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_4 <-> W(e). W_2(e) -> p_4. forall y_4: W_2(y_4) or W(y_4).
p_4 -> W(e) can be inferred via the biconditional elimination rule. W(e) -> p_4 can be inferred via the biconditional elimination rule.