Consider the following premises. For all x_4, x_4 will play squash if and only if x_4 is a server. There is at least one x_4 for which x_4 will play squash if and only if x_4 will climb a mountain. For all x_4, x_4 is not a server. Can we infer the following from them? For all x_4, x_4 will play squash if and only if x_4 is a server.
That is one of the premises. Therefore, the answer is yes.