I think this is basically what is going on. By introducing a mix of debunkable stuff at first but gradually ramping up.
False implicatures and plausible deniability:
"In each of these cases, the speaker is affording themselves
plausible deniability. Trying to move a new relationship (or even an old one) in a different direction can be potentially awkward, especially if the other party isn’t as interested as you. But if you play your cards close enough to the chest, and things go awry, you can always deny you were talking about anything more than coffee, or a night spent binge-watching the latest season of House of Cards."
...
The indirect approach lets you test the waters without committing yourself one way or the other. If they catch your drift, everybody leaves happy; if they don’t, well, you can hardly be found guilty for someone else misunderstanding your otherwise unimpeachable character! (More generally, shifting from one relationship type to another, like from one rooted in dominance to one that’s more transactional, can lead to tension, which is why bribing the maitre d’ for a better table can seem just as nerve-wracking, even if it’s not a crime.)
...And they can always claim they were just expressing genuine concern, as laughable as that might seem.
And, so, indirect speech — and by extension plausible deniability — has many uses, both amongst those in positions of power, and those with none. Though paradoxical on the face of it, it can provide avenues for authoritarians to obtain and maintain control,* while protecting the powerless when all other exits are blocked.**
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