Consider the following premises. p_13 <-> s_4. forall y: S(y). p_13 <-> q_7. s_4 -> ~S(h). Can we infer ~q_7 or p from them?
 From forall y: S(y) we can infer S(h). From s_4 -> ~S(h), S(h) we can infer ~s_4. From p_13 <-> s_4, ~s_4 we can infer ~p_13. From p_13 <-> q_7, ~p_13 we can infer ~q_7. Finally, from ~q_7 we can infer ~q_7 or p. Therefore, the answer is yes.