Consider the following premises. Joseph is not a police officer. If Barbara were a sailor, then Robert is driving a car. For all x_11, x_11 is an artist if and only if x_11 is a police officer. Robert is not driving a car. Can we infer the following from them? Joseph is an artist.
 From the fact that if Barbara were a sailor, then Robert is driving a car, and that Robert is not driving a car we can infer that Barbara is not a sailor. From the fact that for all x_11, x_11 is an artist if and only if x_11 is a police officer we can infer that Joseph is an artist if and only if Joseph is a police officer. Finally, from the fact that Joseph is an artist if and only if Joseph is a police officer, and that Joseph is not a police officer we can infer that Joseph is not an artist, which contradicts that Joseph is an artist. Therefore, the answer is no.