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Is it not a grammatical standard that numbers continued with an ellipsis are not rounded?
This Pi Day page does not round Pi: http://www.piday.org/
"Pi, Greek letter (π), is the symbol for the ratio of the circumference of a circle to its diameter. Pi Day is celebrated by math enthusiasts around the world on March 14th. Pi = 3.1415926535…"
(more Pi = 3.1415926535897932384626433832795...)
So ... how significant is the crop circle's rounding of Pi followed by an ellipsis?