Consider the following premises. For all x_6, if x_6 plays tennis, then x_6 is making tea. There is at least one x_6 for which if x_6 makes tea, then x_6 is playing tennis. For all x_6, if x_6 takes a plane, then x_6 is making tea. For all x_6, x_6 will take a plane or x_6 will play tennis. Can we infer the following from them? There is at least one x_6 for which x_6 will make tea.
 From the fact that there is at least one x_6 for which if x_6 makes tea, then x_6 is playing tennis, and that for all x_6, if x_6 plays tennis, then x_6 is making tea we can infer that there is at least one x_6 for which x_6 will make tea if and only if x_6 will play tennis. From the fact that there is at least one x_6 for which x_6 will make tea if and only if x_6 will play tennis we can infer that there is at least one x_6 for which if x_6 plays tennis, then x_6 is making tea. Finally, from the fact that for all x_6, if x_6 takes a plane, then x_6 is making tea, that there is at least one x_6 for which if x_6 plays tennis, then x_6 is making tea, and that for all x_6, x_6 will take a plane or x_6 will play tennis we can infer that there is at least one x_6 for which x_6 will make tea. Therefore, the answer is yes.