Consider the following premises. For all x_23, x_23 is not a mechanic. It is raining if and only if Thomas is drinking water. It is overcast if and only if James is a mechanic. It is not raining. Can we infer the following from them? It is not overcast and Thomas is not drinking water.
 From the fact that for all x_23, x_23 is not a mechanic we can infer that James is not a mechanic. From the fact that it is overcast if and only if James is a mechanic, and that James is not a mechanic we can infer that it is not overcast. From the fact that it is raining if and only if Thomas is drinking water, and that it is not raining we can infer that Thomas is not drinking water. Finally, from the fact that it is not overcast, and that Thomas is not drinking water we can infer that it is not overcast and Thomas is not drinking water. Therefore, the answer is yes.