A careful reading of the problem statement shows that this a standard corner reflector. We see them every time we shine our car headlights onto a modern STOP sign that is painted with paint containing crystals that are tiny 90 degree corner reflectors. Standing on the floor mirror facing the corner, there will be a mirror on each side that intersect at presumably 90 degrees, and of course the floor at 90 degrees. Even in a modern art museum that humans might visit, there won't be significantly curved or involuted space. Poetry does not supersede physical reality. I regret that I am not amused at all.
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