Blivet
Redirected from Impossible trident illusion The blivet is an undecidable figure, an optical illusion and an impossible object. It was known in 1964, and one was shown on the March 1965 cover of Mad[?] magazine. It is also called a "two-pronged trident" and a "three-legged widget".
It is also called a "two-pronged trident" and a "three-legged widget".
