Consider the following premises. If it is cold, then Susan is playing squash. For all x_5, if x_5 were a taxi driver, then x_5 is playing squash. Susan is a taxi driver or it is cold. Can we infer the following from them? Susan is playing squash.
 From the fact that for all x_5, if x_5 were a taxi driver, then x_5 is playing squash we can infer that if Susan were a taxi driver, then Susan is playing squash. Finally, from the fact that if Susan were a taxi driver, then Susan is playing squash, that if it is cold, then Susan is playing squash, and that Susan is a taxi driver or it is cold we can infer that Susan is playing squash. Therefore, the answer is yes.