Consider the following premises. It is sunny if and only if Karen is listening to a song. It is sunny if and only if Karen is listening to a song. Can we infer the following from them? If it is sunny, then Karen is listening to a song.
 From the fact that it is sunny if and only if Karen is listening to a song we can infer that if Karen listens to a song, then it is sunny. Finally, from the fact that it is sunny if and only if Karen is listening to a song we can infer that if it is sunny, then Karen is listening to a song. Therefore, the answer is yes.