The letters on the glass doors of a beauty parlor read correctly when viewed from the street. How would this lettering appear when seen in a mirror in the parlor, which reflects it from a mirror, which reflects it from another mirror?
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The lettering would appear correctly. Viewed from the back of the door, it would appear reversed. This reversed image in the mirror would appear correctly. That image in the next mirror would again be reversed, and finally that image in the last mirror would be reversed and appear correctly.