Consider the following premises. Jessica is running or Charles is not making tea. Sarah is a writer or Jessica is not running. If Sarah were a writer, then Charles is making tea. Can we infer the following from them? If is not true that Charles is making tea if and only if Jessica is running.
 From the fact that Sarah is a writer or Jessica is not running we can infer that if Jessica goes running, then Sarah is a writer. From the fact that Jessica is running or Charles is not making tea we can infer that if Charles makes tea, then Jessica is running. From the fact that if Jessica goes running, then Sarah is a writer, and that if Sarah were a writer, then Charles is making tea we can infer that if Jessica goes running, then Charles is making tea. Finally, from the fact that if Charles makes tea, then Jessica is running, and that if Jessica goes running, then Charles is making tea we can infer that Charles is making tea if and only if Jessica is running, which contradicts that If is not true that Charles is making tea if and only if Jessica is running. Therefore, the answer is no.