Consider the following premises. For all z_1, z_1 is not a bartender. Patricia is playing squash. If it rains, then Karen is a bartender. Can we infer the following from them? It is raining.
 From the fact that for all z_1, z_1 is not a bartender we can infer that Karen is not a bartender. Finally, from the fact that if it rains, then Karen is a bartender, and that Karen is not a bartender we can infer that it is not raining, which contradicts that It is raining. Therefore, the answer is no.