Consider the following premises. For all x_15, if x_15 were a carpenter, then x_15 is not listening to a song. For all x_15, x_15 is an office clerk or x_15 will listen to a song. For all x_15, x_15 is not an office clerk. For all x_15, x_15 is a carpenter or x_15 will play a game. There is at least one x_15 for which x_15 will make tea if and only if x_15 will play a game. Can we infer the following from them? There is at least one x_15 for which x_15 will make tea.
 From the fact that for all x_15, x_15 is an office clerk or x_15 will listen to a song, and that for all x_15, x_15 is not an office clerk we can infer that for all x_15, x_15 will listen to a song. From the fact that for all x_15, if x_15 were a carpenter, then x_15 is not listening to a song, and that for all x_15, x_15 will listen to a song we can infer that for all x_15, x_15 is not a carpenter. From the fact that there is at least one x_15 for which x_15 will make tea if and only if x_15 will play a game we can infer that there is at least one x_15 for which if x_15 plays a game, then x_15 is making tea. From the fact that for all x_15, x_15 is a carpenter or x_15 will play a game, and that for all x_15, x_15 is not a carpenter we can infer that for all x_15, x_15 will play a game. Finally, from the fact that there is at least one x_15 for which if x_15 plays a game, then x_15 is making tea, and that for all x_15, x_15 will play a game we can infer that there is at least one x_15 for which x_15 will make tea. Therefore, the answer is yes.