Artificial Mimickry
Honestly I think the term "AI" should be banned. It misleads the public into thinking that there is some kind of intelligence in the machine.
But as anyone with a clue knows, these systems are nothing more than statistical regression. (multi-dimensional statistical regression yes, with lots of fancy optimisation over an enormous dataset to make it good)
But fundamentally, all they do is try to copy and extrapolate decisions made by actual intelligent beings (humans) based on a big pile of data that represents (what are assumed to be) correct decisions.
There is no logic behind them. So-called "AI" does not have the power to form IF/THEN/ELSE logical constructs, because it has no cognition. It is simply a guessing machine, and they should be called that: Guessing machines.
Sure, you could take ten thousand real humans and have them do a hundred thousand Turing Tests, 50% against each other, and 50% against deep-fakes, and try to make a turing tester machine.
It might (initially) perform very well. But it would still be a guessing machine. One of the humans might have said that she caught out the deep fake because it made some statement that wasn't logically consistent with her question. Even if she could input her insight into the analysis, how does an LSTM-RNN solve for that? All it can do is say that "this subject looks somewhat like some of the deepfakes" and it is dead-easy to make a new deepfake that fools it.