Consider the following premises. Patricia is not a mechanic. For all x_9, x_9 is a mechanic if and only if x_9 will sleep. Can we infer the following from them? Patricia is sleeping.
 From the fact that for all x_9, x_9 is a mechanic if and only if x_9 will sleep we can infer that for all x_9, if x_9 sleeps, then x_9 is a mechanic. From the fact that for all x_9, if x_9 sleeps, then x_9 is a mechanic we can infer that if Patricia sleeps, then Patricia is a mechanic. Finally, from the fact that if Patricia sleeps, then Patricia is a mechanic, and that Patricia is not a mechanic we can infer that Patricia is not sleeping, which contradicts that Patricia is sleeping. Therefore, the answer is no.