edit: Thank you to all who answered! I’m amazed at how many ways you came up with to answer this.

  • @NeoNachtwaechter
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    4 months ago

    Because the mirror flips your eyes!

    You got a left and a right eye. Now if you had a top and a bottom eye instead, then the mirror would not flip left and right, but top and bottom.

    Buuut… if you had 4 eyes: left, right, top and bottom, then the mirror would flip them all!

      • @NeoNachtwaechter
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        14 months ago

        No, of course not really. Just a provoking thought.

        The high rated responses are the real ones.