Consider the following premises. If Thomas were a soldier, then Linda is fast. For all x_18, x_18 is a soldier. Can we infer the following from them? Linda is fast or Barbara is a carpenter.
 From the fact that for all x_18, x_18 is a soldier we can infer that Thomas is a soldier. From the fact that if Thomas were a soldier, then Linda is fast, and that Thomas is a soldier we can infer that Linda is fast. Finally, from the fact that Linda is fast we can infer that Linda is fast or Barbara is a carpenter. Therefore, the answer is yes.