Consider the following premises. It is raining if and only if Charles is playing tennis. It is raining or James is not an artist. If Charles plays tennis, then James is an artist. Can we infer the following from them? If is not true that it is raining if and only if James is an artist.
 From the fact that it is raining or James is not an artist we can infer that if James were an artist, then it is raining. From the fact that it is raining if and only if Charles is playing tennis we can infer that if it rains, then Charles is playing tennis. From the fact that if it rains, then Charles is playing tennis, and that if Charles plays tennis, then James is an artist we can infer that if it rains, then James is an artist. Finally, from the fact that if it rains, then James is an artist, and that if James were an artist, then it is raining we can infer that it is raining if and only if James is an artist, which contradicts that If is not true that it is raining if and only if James is an artist. Therefore, the answer is no.