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: s -> U_4(j). forall y: U_4(y) <-> W(y). W(j) -> q.
forall y: U_4(y) -> W(y) can be inferred via the universal biconditional elimination rule. forall y: W(y) -> U_4(y) can be inferred via the universal biconditional elimination rule.