Since computation of up/down votes is now available to everythingians, it is also possible to compute the controversy index of a writeup as follows:

CI=1 - (abs(U-D)/abs(u+D)) if U or D are not both zero
CI=0                       if U=D=0

U is the number of Upvotes
D is the number of Downvotes

A highly controversial (divisive) writeup would have U=D, with CI=1, while a node with U or D equaling zero (unanimity) would have a CI of zero; anything else would fall in between.

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