Consider the following premises. For all y, if y were a scientist, then y is fast. For all y, if y were a scientist, then y is curious. For all y, if y plays a game, then y is a scientist. For all y, y is not curious. For all y, if y were fast, then y is playing a game. Can we infer the following from them? There is at least one y for which y will play a game.
 From the fact that for all y, if y were a scientist, then y is fast, and that for all y, if y were fast, then y is playing a game we can infer that for all y, if y were a scientist, then y is playing a game. From the fact that for all y, if y were a scientist, then y is curious, and that for all y, y is not curious we can infer that for all y, y is not a scientist. From the fact that for all y, if y were a scientist, then y is playing a game, and that for all y, if y plays a game, then y is a scientist we can infer that for all y, y is a scientist if and only if y will play a game. Finally, from the fact that for all y, y is a scientist if and only if y will play a game, and that for all y, y is not a scientist we can infer that for all y, y will not play a game, which contradicts that There is at least one y for which y will play a game. Therefore, the answer is no.