Consider the following premises. For all x_8, if x_8 were an artist, then x_8 is not an electrician. For all x_8, x_8 is an electrician. There is at least one x_8 for which x_8 is a police officer if and only if x_8 is an artist. Can we infer the following from them? For all x_8, x_8 is a police officer.
 From the fact that there is at least one x_8 for which x_8 is a police officer if and only if x_8 is an artist we can infer that there is at least one x_8 for which if x_8 were a police officer, then x_8 is an artist. From the fact that for all x_8, if x_8 were an artist, then x_8 is not an electrician, and that for all x_8, x_8 is an electrician we can infer that for all x_8, x_8 is not an artist. Finally, from the fact that there is at least one x_8 for which if x_8 were a police officer, then x_8 is an artist, and that for all x_8, x_8 is not an artist we can infer that there is at least one x_8 for which x_8 is not a police officer, which contradicts that For all x_8, x_8 is a police officer. Therefore, the answer is no.