Consider the following premises. Elisabeth is a politician or Charles is drinking water. If Elisabeth were a politician, then Charles is an electrician. For all x_7, x_7 is an electrician or x_7 will not drink water. Can we infer the following from them? Charles is an electrician.
 From the fact that for all x_7, x_7 is an electrician or x_7 will not drink water we can infer that for all x_7, if x_7 drinks water, then x_7 is an electrician. From the fact that for all x_7, if x_7 drinks water, then x_7 is an electrician we can infer that if Charles drinks water, then Charles is an electrician. Finally, from the fact that if Elisabeth were a politician, then Charles is an electrician, that if Charles drinks water, then Charles is an electrician, and that Elisabeth is a politician or Charles is drinking water we can infer that Charles is an electrician. Therefore, the answer is yes.