Consider the following premises. If John plays squash, then James is a politician. James is a politician or John is not a janitor. For all x_10, x_10 will make tea or x_10 is a janitor. For all x_10, x_10 will not make tea or x_10 will play squash. Can we infer the following from them? If we can, name the inference rule being used: For all x_10, x_10 will not make tea or x_10 will play squash.
That is one of the premises. Therefore, the answer is yes.