Consider the following premises. For all x_17, x_17 will play a game if and only if x_17 will write a letter. If David were a carpenter, then it is windy. For all x_17, x_17 will not write a letter. For all x_17, x_17 will play a game or x_17 is a carpenter. Can we infer the following from them? It is windy.
 From the fact that for all x_17, x_17 will play a game if and only if x_17 will write a letter, and that for all x_17, x_17 will not write a letter we can infer that for all x_17, x_17 will not play a game. From the fact that for all x_17, x_17 will play a game or x_17 is a carpenter, and that for all x_17, x_17 will not play a game we can infer that for all x_17, x_17 is a carpenter. From the fact that for all x_17, x_17 is a carpenter we can infer that David is a carpenter. Finally, from the fact that if David were a carpenter, then it is windy, and that David is a carpenter we can infer that it is windy. Therefore, the answer is yes.