#2 I forgot that that was a thing. Makes sense. #3 seems existentially hard to prove- and it seems like half the competition would be getting cold, hard evide

#2 I forgot that that was a thing. Makes sense. #3 seems existentially hard to prove- and it seems like half the competition would be getting cold, hard evidence that they did it- recording themselves doing whatever at a much higher resolution than possible might work. #4 Makes sense. Maybe the earth is actually flat, and they got to the other side of it? [/s, obviously]