Consider the following premises. For all x_8, x_8 will play tennis if and only if x_8 will write a letter. For all x_8, x_8 will drive a car. For all x_8, x_8 will write a letter or x_8 will play squash. For all x_8, if x_8 plays squash, then x_8 is playing tennis. Can we infer the following from them? There is at least one x_8 for which either x_8 will play tennis or x_8 will drive a car are not true.
 From the fact that for all x_8, x_8 will play tennis if and only if x_8 will write a letter we can infer that for all x_8, if x_8 writes a letter, then x_8 is playing tennis. From the fact that for all x_8, if x_8 writes a letter, then x_8 is playing tennis, that for all x_8, if x_8 plays squash, then x_8 is playing tennis, and that for all x_8, x_8 will write a letter or x_8 will play squash we can infer that for all x_8, x_8 will play tennis. Finally, from the fact that for all x_8, x_8 will play tennis, and that for all x_8, x_8 will drive a car we can infer that for all x_8, x_8 will play tennis and x_8 will drive a car, which contradicts that There is at least one x_8 for which either x_8 will play tennis or x_8 will drive a car are not true. Therefore, the answer is no.