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We see upside down, so the brain has to turn that around, and then everything including motion that goes with it. We have 2 ears that each hear what they hear, then the brain has to interpret that as spatial information. Military exercises teach "off center" seeing at night, since when staring at something in near darkness it usually disappears. I've always assumed there's an audio "blind spot" that defeats a lot of blind testing of very subtle differences.