Consider the following premises. There is at least one y_4 for which if y_4 plays tennis, then y_4 is playing squash. For all y_4, y_4 will take a plane or y_4 is not excited. For all y_4, if y_4 plays squash, then y_4 is excited. Can we infer the following from them? If we can, name the inference rule being used: For all y_4, y_4 will take a plane or y_4 is not excited.
That is one of the premises. Therefore, the answer is yes.