Consider the following premises. For all x_16, x_16 will drink water. For all x_16, x_16 will drink water if and only if x_16 is poor. Can we infer the following from them? Susan is poor or Karen is fast.
 From the fact that for all x_16, x_16 will drink water if and only if x_16 is poor we can infer that for all x_16, if x_16 drinks water, then x_16 is poor. From the fact that for all x_16, if x_16 drinks water, then x_16 is poor, and that for all x_16, x_16 will drink water we can infer that for all x_16, x_16 is poor. From the fact that for all x_16, x_16 is poor we can infer that Susan is poor. Finally, from the fact that Susan is poor we can infer that Susan is poor or Karen is fast. Therefore, the answer is yes.