What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? ~q_6. forall y_1: R_3(y_1) <-> U(y_1). s <-> R_3(a_12). U(a_12) -> q_6.
~U(a_12). s -> R_3(a_12). R_3(a_12) -> s. forall y_1: R_3(y_1) -> U(y_1). forall y_1: U(y_1) -> R_3(y_1).