Consider the following premises. It is sunny if and only if William is curious. If William were curious, then it is not cold. If it is late, then it is cold. It is windy or it is late. If it is windy, then it is cold. Can we infer the following from them? If we can, name the inference rule being used: It is sunny.
 From the fact that if it is windy, then it is cold, that if it is late, then it is cold, and that it is windy or it is late we can infer that it is cold via disjunction elimination. From the fact that if William were curious, then it is not cold, and that it is cold we can infer that William is not curious via modus tollens. Finally, from the fact that it is sunny if and only if William is curious, and that William is not curious we can infer that it is not sunny via biconditional elimination, which contradicts that It is sunny. Therefore, the answer is no.