Well some of the claims do appear a bit far fetched and the terms used are really confusing (my bet is that the programmer is non-native speaker).
And it's not banned from Wikipedia, it's just deemed not relevant. But that can't be all, can it?
And it's not banned from Wikipedia, it's just deemed not relevant. But that can't be all, can it?
As for the second, I agree that the source of those "units sold" should be cited.
They claim their algorithm is impossible to solve using robots... When it is obvious that it isn't impossible...
The purpose of the example is to give you a basis on which you could implement an effective CAPTCHA.
The claim of "difficult or even completely impossible for robots" applies to CAPTCHAs using the above techniques, which are not used in the example.