Consider the following premises. For all x_13, x_13 will write a letter or x_13 is sad. For all x_13, if x_13 were sad, then x_13 is playing tennis. For all x_13, if x_13 drives a car, then x_13 is not playing tennis. Linda is driving a car or it is sunny. For all x_13, if x_13 writes a letter, then x_13 is playing tennis. Can we infer the following from them? It is not sunny.
 From the fact that for all x_13, if x_13 writes a letter, then x_13 is playing tennis, that for all x_13, if x_13 were sad, then x_13 is playing tennis, and that for all x_13, x_13 will write a letter or x_13 is sad we can infer that for all x_13, x_13 will play tennis. From the fact that for all x_13, if x_13 drives a car, then x_13 is not playing tennis, and that for all x_13, x_13 will play tennis we can infer that for all x_13, x_13 will not drive a car. From the fact that for all x_13, x_13 will not drive a car we can infer that Linda is not driving a car. Finally, from the fact that Linda is driving a car or it is sunny, and that Linda is not driving a car we can infer that it is sunny, which contradicts that It is not sunny. Therefore, the answer is no.