Consider the following premises. Jessica is not fast. Karen is playing a game. If James were a poet, then Linda is running. Linda is running if and only if Jessica is fast. Can we infer the following from them? James is a poet.
 From the fact that Linda is running if and only if Jessica is fast, and that Jessica is not fast we can infer that Linda is not running. Finally, from the fact that if James were a poet, then Linda is running, and that Linda is not running we can infer that James is not a poet, which contradicts that James is a poet. Therefore, the answer is no.