Consider the following premises. For all x_10, if x_10 were sad, then x_10 is an electrician. For all x_10, if x_10 works, then x_10 is playing a game. There is at least one x_10 for which x_10 is a scientist or x_10 will work. For all x_10, x_10 is not a scientist or x_10 is sad. For all x_10, x_10 is an electrician if and only if x_10 will play a game. Can we infer the following from them? For all x_10, x_10 is not an electrician.
 From the fact that there is at least one x_10 for which x_10 is a scientist or x_10 will work, and that for all x_10, x_10 is not a scientist or x_10 is sad we can infer that there is at least one x_10 for which x_10 will work or x_10 is sad. From the fact that for all x_10, x_10 is an electrician if and only if x_10 will play a game we can infer that for all x_10, if x_10 plays a game, then x_10 is an electrician. From the fact that for all x_10, if x_10 works, then x_10 is playing a game, and that for all x_10, if x_10 plays a game, then x_10 is an electrician we can infer that for all x_10, if x_10 works, then x_10 is an electrician. Finally, from the fact that for all x_10, if x_10 works, then x_10 is an electrician, that for all x_10, if x_10 were sad, then x_10 is an electrician, and that there is at least one x_10 for which x_10 will work or x_10 is sad we can infer that there is at least one x_10 for which x_10 is an electrician, which contradicts that For all x_10, x_10 is not an electrician. Therefore, the answer is no.