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Very nice! I love this kind of mathematical detective-story - I'm reminded of Nate Silver's consideration of the polling firm Strategic Vision here and here - but this is far, far more blatant.
Previous Open Thread
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one.
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.