Consider the following premises. For all x_9, x_9 is poor or x_9 is an electrician. There is at least one x_9 for which x_9 will climb a mountain if and only if x_9 is an electrician. For all x_9, x_9 is not poor. Can we infer the following from them? If we can, name the inference rule being used: There is at least one x_9 for which x_9 will climb a mountain if and only if x_9 is an electrician.
That is one of the premises. Therefore, the answer is yes.