Consider the following premises. For all x_15, if x_15 were a sailor, then x_15 is playing squash. If Jennifer plays squash, then David is not cooking. If it snows, then Jennifer is a sailor. David is cooking. Can we infer the following from them? It is not snowing.
 From the fact that for all x_15, if x_15 were a sailor, then x_15 is playing squash we can infer that if Jennifer were a sailor, then Jennifer is playing squash. From the fact that if Jennifer plays squash, then David is not cooking, and that David is cooking we can infer that Jennifer is not playing squash. From the fact that if it snows, then Jennifer is a sailor, and that if Jennifer were a sailor, then Jennifer is playing squash we can infer that if it snows, then Jennifer is playing squash. Finally, from the fact that if it snows, then Jennifer is playing squash, and that Jennifer is not playing squash we can infer that it is not snowing. Therefore, the answer is yes.