On Tue, Jun 17, 2014 at 10:43:04AM -0700,
 Matthew Ghali <[email protected]> wrote 
 a message of 133 lines which said:

> Your methodology may have been sufficient 20 years ago, but just
> about any CDN complicates the issue.  How do you propose
> distinguishing between deliberate traffic engineering and lies,

Heuristics: you query facebook.com from many places in the world (for
instance by using RIPE Atlas probes) and you see that all the answers
are in the same prefix, except in China. This is a good indication.
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