But the sky mirror does make sense.
The naturally occurring earth-sized, perfectly formed, polished, floating elipsoid space mirror or mirrors which reflect sunlight and starlight, perhaps twice so as to remove any image inversion, which is there to account for an inconsistency in how the sun would light the southern hempisphere(plane) for a flat earth, that is not impacted by thermal distortion, doesn't collect space debris, is undetectable and is invisible to everyone and which will not have the ability to correctly focus reflected light from the earth (which expalins why you can't see the surface of the earth in it), but it can clearly reflect points of light such as stars and planets, twice, makes sense even in the face of a lack of evidence to back up it's existence?