Let me make sure I understand what you're saying. A lie is different than a falsehood. A lie is a KIND of falsehood. A falsehood is only a lie, if the person communicating it knows that it's false.

Oddly, I have known people who, because they think something up, that it must be true. They're not aware that they're just making stuff up. It was a rude awakening for me. These people are delusional.

But to make up a fact and consciously recognize that you are making it up, that while you are making it up you are aware that it is contrived and then later to forget that ever fabricated it, like in 1984. This is a very odd thing. A politician? An O'Brien?