Science Fair Project Encyclopedia
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 has appeared numerous times since then).
An anonymously-contributed version described as a "hole location gauge" was printed in the June 1964 issue of Analog Science Fact/Science Fiction, with the comment that "this outrageous piece of draughtsmanship evidently escaped from the Finagle & Diddle Engineering Works".
It is also called a poiuyt, widget, two-pronged trident, three-legged widget, Devil's pitchfork, or Devil's tuning fork.
A blivet is considered a Cadigan to some.
External links
Last updated: 10-11-2005 15:45:55
03-10-2013 05:06:04
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details