Three Hares - As An Optical Illusion or Puzzle

As An Optical Illusion or Puzzle

The logo presents a problem in topology. It is a strange loop or rendered as a puzzle

Jurgis Baltrusaitis's (1955) Le Moyen-Âge fantastique. Antiquités et exotismes dans l'art gothique includes a 1576 Dutch engraving with the puzzle given in Dutch and French around the image. It notes:

The secret is not great when one knows it.
But it is something to one who does it.
Turn and turn again and we will also turn,
So that we give pleasure to each of you.
And when we have turned, count our ears,
It is there, without any disguise, you will find a marvel.

"These are the oldest known dated examples of the Three Rabbits as a puzzle." One commentator believes its being a puzzle is likely reason for the image's popularity.

One recent philosophical book poses it as a problem in perception and an optical illusion—an example of contour rivalry. Each rabbit can be individually seen as correct—it is only when you try to see all three at once that you see the problem with defining the hares' ears. This is similar to "The Impossible Tribar" by Roger Penrose, first originated by Oscar Reutersvärd. Compare, M.C. Escher See, Impossible object.

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