Consider the following premises. James is taking a plane or Elisabeth is curious. If James takes a plane, then Elisabeth is sleeping. For all x_7, x_7 will sleep if and only if x_7 is curious. Can we infer the following from them? Elisabeth is not sleeping.
 From the fact that for all x_7, x_7 will sleep if and only if x_7 is curious we can infer that Elisabeth is sleeping if and only if Elisabeth is curious. From the fact that Elisabeth is sleeping if and only if Elisabeth is curious we can infer that if Elisabeth were curious, then Elisabeth is sleeping. Finally, from the fact that if James takes a plane, then Elisabeth is sleeping, that if Elisabeth were curious, then Elisabeth is sleeping, and that James is taking a plane or Elisabeth is curious we can infer that Elisabeth is sleeping, which contradicts that Elisabeth is not sleeping. Therefore, the answer is no.