Would it be possible for both AI's to find out other AI's technique? Don't bring up any gate walls/ firewalls stories, please. What if there is a missed case?

Would it be possible for both AI's to find out other AI's technique? Don't bring up any gate walls/ firewalls stories, please. What if there is a missed case? Here is an example. 1. News about AI-driven-fake-news gets published. 2. AI reads it and understands it. 3. EXPLAIN HERE - HOW THE SITUATION IS KEPT UNDER CONTROL ? Its an intellectual competition. Just like how facebook's bots went on a fight that we didn't understand, the shared example may also get into that stage.