Need help in understanding a python code

[alex23]

On Nov 17, 11:40 am, Matt Nordhoff <mnordh... at mattnordhoff.com> wrote:
> That study has been disputed; see the links at the top of
> <http://en.wikipedia.org/wiki/Reliability_of_Wikipedia>.

Now, if there was any independent refutation of the original study
that isn't based on Britannica's - not that I'm outright accusing them
of any bias here :) - that might make a reasonable disputation...