Consider the following premises. Richard is a police officer if and only if Jessica is an astronaut. Jessica is an astronaut if and only if Mary is a server. Richard is not a police officer. Mary is a server if and only if James is taking a plane. Can we infer the following from them? If we can, name the inference rule being used: James is taking a plane.
 From the fact that Richard is a police officer if and only if Jessica is an astronaut, and that Richard is not a police officer we can infer that Jessica is not an astronaut via biconditional elimination. From the fact that Jessica is an astronaut if and only if Mary is a server, and that Jessica is not an astronaut we can infer that Mary is not a server via biconditional elimination. Finally, from the fact that Mary is a server if and only if James is taking a plane, and that Mary is not a server we can infer that James is not taking a plane via biconditional elimination, which contradicts that James is taking a plane. Therefore, the answer is no.