Consider the following premises. If Charles were an artist, then it is not cloudy. Jennifer is curious. It is cloudy and Charles is excited. Can we infer the following from them? If we can, name the inference rule being used: Charles is an artist.
 From the fact that it is cloudy and Charles is excited we can infer that it is cloudy via simplification. Finally, from the fact that if Charles were an artist, then it is not cloudy, and that it is cloudy we can infer that Charles is not an artist via modus tollens, which contradicts that Charles is an artist. Therefore, the answer is no.