Consider the following premises. For all x_9, x_9 is a taxi driver or x_9 is not a doctor. For all x_9, if x_9 were a taxi driver, then x_9 is curious. For all x_9, if x_9 were a sailor, then x_9 is a doctor. For all x_9, if x_9 takes a plane, then x_9 is a sailor. Can we infer the following from them? If we can, name the inference rule being used: For all x_9, if x_9 takes a plane, then x_9 is a sailor.
That is one of the premises. Therefore, the answer is yes.