The Shepard elephant, also known as l'egs-istential quandary or the impossible elephant, is a perceptual illusion, of the type impossible object, based on figure-ground confusion. As its creator Roger Shepard explains: The elephant…belongs to a class of objects that are truly impossible in that the object itself cannot be globally segregated from the nonobject or background.
The Shepard elephant, also known as l'egs-istential quandary or the impossible elephant, is a perceptual illusion, of the type impossible object, based on figure-ground confusion. As its creator Roger Shepard explains: The elephant…belongs to a class of objects that are truly impossible in that the object itself cannot be globally segregated from the nonobject or background.
Source: Wikipedia "Shepard elephant" · CC BY-SA 4.0
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