Do sommeliers ever have to retake the test? Creating a test with a low pass rate is not hard and doesn't really prove anything unless it delivers consistent results.
Test could just be if (rand() < .0001)
Country x region x sub-region x grape variety x vintage?
Obscenely hard randomly, multiple times?
I believe there are multiple levels that get progressively harder so even more unlikely unlikely.
Maybe the culture on the lower levels, but certainly not at the top.
> And they'll comment on different 'subtle notes of chocolate' in a product that is entirely made of grapes and yeast.
https://www.imdb.com/title/tt2204371/