Only someone trying to cheat would use the excuse that it wasn’t explicitly stated that AI was cheating.
This reminds me of the court case where they asked the court to define child pornography and they said “I can can’t define it, but I know it when I see it.”
Imagine saying with a straight face that some pictures you have of a minor are fine because this particular pose, facial expression, and clothing wasn’t specifically designed child porn. It would instantly make you sound like a pedo, like he sounds like a cheater