Consider the following premises. For all x_11, if x_11 were a scientist, then x_11 is not taking a plane. If Jessica plays tennis, then James is fast. For all x_11, x_11 will take a plane. For all x_11, x_11 is fast if and only if x_11 is a scientist. Can we infer the following from them? Jessica is playing tennis.
 From the fact that for all x_11, if x_11 were a scientist, then x_11 is not taking a plane, and that for all x_11, x_11 will take a plane we can infer that for all x_11, x_11 is not a scientist. From the fact that for all x_11, x_11 is fast if and only if x_11 is a scientist, and that for all x_11, x_11 is not a scientist we can infer that for all x_11, x_11 is not fast. From the fact that for all x_11, x_11 is not fast we can infer that James is not fast. Finally, from the fact that if Jessica plays tennis, then James is fast, and that James is not fast we can infer that Jessica is not playing tennis, which contradicts that Jessica is playing tennis. Therefore, the answer is no.