Consider the following premises. forall x_23: W(x_23) -> S_23(x_23). q_6 -> S_23(i). W(i) or q_6. r and q_14. Can we infer ~S_23(i) from them?
 From forall x_23: W(x_23) -> S_23(x_23) we can infer W(i) -> S_23(i). From r and q_14 we can infer r. Finally, from W(i) -> S_23(i), q_6 -> S_23(i), W(i) or q_6 we can infer S_23(i), which contradicts ~S_23(i). Therefore, the answer is no.