The tactic is simply to talk relevantly until the listener fools themselves into thinking they understand you, except that "understanding" will be an illusion and 100% manager's own analytical effort. And it's honestly embarrassing how often and well that works. Quite a few of those guys were promoted first, too.
I'm pretty sure our upcoming future with AI will be like that quote from forest ranger at Yosemite National Park, on why it is hard to design the perfect garbage bin to keep bears from breaking into it: "There is a considerable overlap between the intelligence of the smartest bears and the dumbest tourists."
The whole idea of a criteria to separate humans from AI is a misconception. I think any human who confuses smooth talking with making sense will be ruthlessly exploited in relatively near future. There are humans who already do this successfully to other humans, what do you think will happen when they get to automate their efforts.