Consider the following premises. For all y, if y sleeps, then y is a lawyer. If Thomas were a bartender, then David is sleeping. If Sarah drives a car, then Thomas is a bartender. Sarah is driving a car if and only if it is windy. Can we infer the following from them? If we can, name the inference rule being used: If it is windy, then David is a lawyer.
 From the fact that for all y, if y sleeps, then y is a lawyer we can infer that if David sleeps, then David is a lawyer via universal instantiation. From the fact that Sarah is driving a car if and only if it is windy we can infer that if it is windy, then Sarah is driving a car via biconditional elimination. From the fact that if Sarah drives a car, then Thomas is a bartender, and that if Thomas were a bartender, then David is sleeping we can infer that if Sarah drives a car, then David is sleeping via transitivity. From the fact that if Sarah drives a car, then David is sleeping, and that if David sleeps, then David is a lawyer we can infer that if Sarah drives a car, then David is a lawyer via transitivity. Finally, from the fact that if it is windy, then Sarah is driving a car, and that if Sarah drives a car, then David is a lawyer we can infer that if it is windy, then David is a lawyer via transitivity. Therefore, the answer is yes.