It evolved from one to the other. It’s like the brain developed their ability for double think as a response to the constant bombardment of cognitive dissonance. So instead of paying attention to that little ping of “hey, wait a second,” and having to make a semi-consciuos choice to ignore it, their brains straight up skip that part in order to reduce psychic pain.
It’s kind of insane just how on the money Orwell was.
I remember every time I’d read 1984 after the first, I would get to the part where he has that long, dry, treatise on the power of language as a means of control, and I used to dread it (skipped it usually after the first read through). It always seemed boring and just completely far-fetched. Yeah the whole world-building aspect of doublespeak and doublethink was great, but surely humans aren’t that susceptible to being controlled through language…