It is not perception, it is having a semi-plausible situation (belt matches plane speed) and an impossible situation (belt matches wheel speed). In the later, it is an exercise in futility as it would just go off in to infinitum. The plane would still take off, however, the question is not possible, because of that reason. The belt would never be able to “match” wheel speed and time would explode. Answer the question requires you to suspend certain realities (ie, why the fuck is there a plane on a treadmill in the first place). Another one is that if you are choosing the second wording, you have to assume, that belt matches wheel. The reality is that the answer is simple, and it is only simple people who can’t understand it.