You know why UFO reports are so unreliable? Because people cannot judge the size or speed of objects against a blank background. You look at a shape against the sky. You don't know what it is, therefore you have no reference as to size. You can't
gauge the size reliably because there is ZERO frame of reference, therefore you can't judge how high it is either. You see it supposedly move, you have no idea of its real speed because again, no frame of reference. 3 dimensional vision of humans is
only good to a certain distance as well.

https://www.bbc.com/future/article/20230726-the-weird-incidents-piquing-nasas-interest

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