Impossible trident

An impossible trident, also known as an impossible fork, a blivet, poiuyt, devil's tuning fork, etc., is a drawing of an impossible object (undecipherable figure), a kind of an optical illusion. It appears to have three cylindrical prongs at one end which then mysteriously transform into two rectangular prongs at the other end.

单词	Blivet
释义	Blivet 英语百科 Impossible trident An impossible trident, also known as an impossible fork, a blivet, poiuyt, devil's tuning fork, etc., is a drawing of an impossible object (undecipherable figure), a kind of an optical illusion. It appears to have three cylindrical prongs at one end which then mysteriously transform into two rectangular prongs at the other end.
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Blivet

Impossible trident