Consider the following premises. If Robert were curious, then Michael is poor. If Michael were poor, then Thomas is a mechanic. If Thomas were a mechanic, then Robert is curious. Thomas is a mechanic if and only if it is snowing. It is not snowing. Can we infer the following from them? Robert is not curious.
 From the fact that if Robert were curious, then Michael is poor, and that if Michael were poor, then Thomas is a mechanic we can infer that if Robert were curious, then Thomas is a mechanic. From the fact that Thomas is a mechanic if and only if it is snowing, and that it is not snowing we can infer that Thomas is not a mechanic. From the fact that if Thomas were a mechanic, then Robert is curious, and that if Robert were curious, then Thomas is a mechanic we can infer that Thomas is a mechanic if and only if Robert is curious. Finally, from the fact that Thomas is a mechanic if and only if Robert is curious, and that Thomas is not a mechanic we can infer that Robert is not curious. Therefore, the answer is yes.