@hourly_shitpost As a teacher, if I put that it means you wrote something insane that makes no sense. I usually go through correct answers in a lesson I don't have time to write it on every paper
@hankgreen I think what this boils down to is whether the environment on the blue side of the portal is 'getting closer' to you as the train does. I don't think this is the case so I'm now team A. The environment on orange side is stationary wrt to environment on blue side.