Consider the following premises. For all x_15, x_15 will take a plane or x_15 will not make tea. There is at least one x_15 for which x_15 is a police officer if and only if x_15 will take a plane. For all x_15, if x_15 were a police officer, then x_15 is not playing tennis. For all x_15, if x_15 takes a plane, then x_15 is making tea. For all x_15, x_15 will play tennis. Can we infer the following from them? There is at least one x_15 for which x_15 will not make tea.
 From the fact that for all x_15, if x_15 were a police officer, then x_15 is not playing tennis, and that for all x_15, x_15 will play tennis we can infer that for all x_15, x_15 is not a police officer. From the fact that for all x_15, x_15 will take a plane or x_15 will not make tea we can infer that for all x_15, if x_15 makes tea, then x_15 is taking a plane. From the fact that for all x_15, if x_15 makes tea, then x_15 is taking a plane, and that for all x_15, if x_15 takes a plane, then x_15 is making tea we can infer that for all x_15, x_15 will make tea if and only if x_15 will take a plane. From the fact that there is at least one x_15 for which x_15 is a police officer if and only if x_15 will take a plane, and that for all x_15, x_15 is not a police officer we can infer that there is at least one x_15 for which x_15 will not take a plane. Finally, from the fact that for all x_15, x_15 will make tea if and only if x_15 will take a plane, and that there is at least one x_15 for which x_15 will not take a plane we can infer that there is at least one x_15 for which x_15 will not make tea. Therefore, the answer is yes.