Consider the following premises. Sarah is an artist if and only if Richard is taking a plane. Richard is taking a plane if and only if it is overcast. Sarah is not an artist. If Jessica were curious, then it is overcast. Can we infer the following from them? If we can, name the inference rule being used: Jessica is curious.
 From the fact that Sarah is an artist if and only if Richard is taking a plane, and that Sarah is not an artist we can infer that Richard is not taking a plane via biconditional elimination. From the fact that Richard is taking a plane if and only if it is overcast, and that Richard is not taking a plane we can infer that it is not overcast via biconditional elimination. Finally, from the fact that if Jessica were curious, then it is overcast, and that it is not overcast we can infer that Jessica is not curious via modus tollens, which contradicts that Jessica is curious. Therefore, the answer is no.