Consider the following premises. For all x_4, if x_4 plays a game, then x_4 is making tea. For all x_4, x_4 is a janitor or x_4 is an electrician. For all x_4, if x_4 were an electrician, then x_4 is making tea. For all x_4, x_4 is not a janitor. Can we infer the following from them? There is at least one x_4 for which x_4 will not make tea.
 From the fact that for all x_4, x_4 is a janitor or x_4 is an electrician, and that for all x_4, x_4 is not a janitor we can infer that for all x_4, x_4 is an electrician. From the fact that for all x_4, x_4 is an electrician we can infer that for all x_4, x_4 is an electrician or x_4 will play a game. Finally, from the fact that for all x_4, if x_4 were an electrician, then x_4 is making tea, that for all x_4, if x_4 plays a game, then x_4 is making tea, and that for all x_4, x_4 is an electrician or x_4 will play a game we can infer that for all x_4, x_4 will make tea, which contradicts that There is at least one x_4 for which x_4 will not make tea. Therefore, the answer is no.