1. The op is lying about his experience.
He states he answered NO to question 2, which is what you claim to be looking for. Unless his answer to question 1 was "Work for Optimizely" (which, I guess, someone might say, maybe) then I don't see how you get a contradiction. By your logic, he would have been a hire.
2. The recruiter lied to him about why he was rejected.
Maybe everyone got a short sit down with the CEO back then and he took that to mean he passed all the other interviews? Maybe something else didn't check out and that was an easy way to let him down?
Anyway, if you're A/B testing, wouldn't you hire people regardless of their answers and then assess their performance over a longer timeframe to determine the efficacy of the questions and answers?