Consider the following premises. If Charles were a carpenter, then James is a janitor. Charles is a carpenter or it is overcast. James is not a janitor. It is overcast if and only if it is windy. Can we infer the following from them? If we can, name the inference rule being used: It is not windy.
 From the fact that if Charles were a carpenter, then James is a janitor, and that James is not a janitor we can infer that Charles is not a carpenter via modus tollens. From the fact that it is overcast if and only if it is windy we can infer that if it is overcast, then it is windy via biconditional elimination. From the fact that Charles is a carpenter or it is overcast, and that Charles is not a carpenter we can infer that it is overcast via disjunctive syllogism. Finally, from the fact that if it is overcast, then it is windy, and that it is overcast we can infer that it is windy via modus ponens, which contradicts that It is not windy. Therefore, the answer is no.