Consider the following premises. If William were bored, then David is playing tennis. For all x_15, if x_15 plays tennis, then x_15 is reading a book. William is bored or David is not reading a book. Can we infer the following from them? If we can, name the inference rule being used: For all x_15, if x_15 plays tennis, then x_15 is reading a book.
That is one of the premises. Therefore, the answer is yes.