Consider the following premises. For all x_7, x_7 will climb a mountain if and only if x_7 is a scientist. For all x_7, if x_7 listens to a song, then x_7 is a scientist. For all x_7, x_7 will climb a mountain or x_7 will listen to a song. Can we infer the following from them? James is a scientist.
 From the fact that for all x_7, x_7 will climb a mountain if and only if x_7 is a scientist we can infer that for all x_7, if x_7 climbs a mountain, then x_7 is a scientist. From the fact that for all x_7, if x_7 climbs a mountain, then x_7 is a scientist, that for all x_7, if x_7 listens to a song, then x_7 is a scientist, and that for all x_7, x_7 will climb a mountain or x_7 will listen to a song we can infer that for all x_7, x_7 is a scientist. Finally, from the fact that for all x_7, x_7 is a scientist we can infer that James is a scientist. Therefore, the answer is yes.