Consider the following premises. For all x_8, if x_8 plays a game, then x_8 is a writer. For all x_8, x_8 is not a mechanic. For all x_8, x_8 will play a game or x_8 is a scientist. For all x_8, x_8 is a writer if and only if x_8 is a mechanic. Can we infer the following from them? For all x_8, x_8 is a scientist.
 From the fact that for all x_8, x_8 is a writer if and only if x_8 is a mechanic, and that for all x_8, x_8 is not a mechanic we can infer that for all x_8, x_8 is not a writer. From the fact that for all x_8, if x_8 plays a game, then x_8 is a writer, and that for all x_8, x_8 is not a writer we can infer that for all x_8, x_8 will not play a game. Finally, from the fact that for all x_8, x_8 will play a game or x_8 is a scientist, and that for all x_8, x_8 will not play a game we can infer that for all x_8, x_8 is a scientist. Therefore, the answer is yes.