What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? u -> p. S_17(a_17) -> p. u or R_17(a_17). forall x_17: R_17(x_17) -> S_17(x_17). p -> u.
S_17(a_17) -> u. R_1(a_17) -> u. u <-> p. p <-> u.