Consider the following premises. For all z, if z were bored, then z is a taxi driver. For all z, if z were bored, then z is playing tennis. For all z, if z were a taxi driver, then z is bored. Can we infer the following from them? If we can, name the inference rule being used: For all z, if z were bored, then z is a taxi driver.
That is one of the premises. Therefore, the answer is yes.