Consider the following premises. David is poor or Robert is climbing a mountain. For all x_8, x_8 is not curious. For all x_8, x_8 is curious if and only if x_8 is poor. Can we infer the following from them? Robert is not climbing a mountain.
 From the fact that for all x_8, x_8 is curious if and only if x_8 is poor, and that for all x_8, x_8 is not curious we can infer that for all x_8, x_8 is not poor. From the fact that for all x_8, x_8 is not poor we can infer that David is not poor. Finally, from the fact that David is poor or Robert is climbing a mountain, and that David is not poor we can infer that Robert is climbing a mountain, which contradicts that Robert is not climbing a mountain. Therefore, the answer is no.