It's statistics. Nothing can be 100%; similar to Fantoni/Nunes.
However, as more boards are added, the statistical probability of this being a false/positive can be calculated.
Yes. There is. I wrote a book on it.
Shameless plug. http://www.detectingcheatinginbridge.com
Finding the best algorithms to detect cheating was difficult/time-consuming. But the software correctly identifies the known recent cheaters (FN, BZ, FS, Doktors, PS) as well as identifying pairs such as Buratti/Lanzarotti as a ...
She also had 11 second place finishes. See https://en.wikipedia.org/wiki/Beth_Palmer
(TL/DR. Beth's Wikipedia page was created in 2014. At the time she had 26 NABC wins. No-one had updated the page for her wins since 2014. Anyone can edit Wikipedia. There are many other ...
@Barry: "they're questioning the ACBL and the Educational Foundation in funding a movie that wouldn't necessarily promote bridge"
ACBL did not fund the movie. ACBL and the ACBL Educational Foundation are completely separate entities.
Why are Mitch Dunitz and Barbara Heller listed as Executive Producers?
See https://www.youtube.com/watch?v=hs_10C9p-FQ
Was this a requirement from the ACBL Education Foundation?