What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? p_4 <-> s_2. p_14 <-> u_3. ~u_3. p_14 <-> p. p_4 <-> p.
p_4 -> s_2. p_14 -> u_3. p_14 -> p. p_4 -> p. s_2 -> p_4. u_3 -> p_14. p -> p_14. p -> p_4. ~p_14.