"Alternative facts means the power of holding two contradictory beliefs in one's mind simultaneously, and accepting both of them. The Party intellectual knows in which direction his memories must be altered: he therefore knows that he is playing tricks with reality: but by the exercise of alternative facts he also satisfies himself that reality is not violated. The process has to be conscious, or it would not be carried out with sufficient precision, but it also has to be unconscious, or it would bring with it a feeling of falsity and hence of guilt.

Alternative facts lies at the very heart of Ingsoc, since the essential act of the Party is to use conscious deception while retaining the firmness of purpose that goes with complete honesty. To tell deliberate lies while genuinely believing them and to forget any fact that has become inconvenient, and then, when it becomes necessary again, to draw it back from oblivion for just so long as it is needed, to deny the existence of objective reality and all the while to take account of the reality which one denies - all this is indispensably necessary. Even in using the word alternative facts it is necessary to exercise alternative facts. For by using the word one admits that one is tampering with reality: by a fresh act of alternative facts one erases this knowledge: and so on indefinitely, with the lie always one leap ahead of the truth. Ultimately it is by means of alternative facts that the Party has been able - and may, for all we know, continue to be able for thousands of years - to arrest the course of history...

...

The subtlest practitioners of alternative facts are those who invented alternative facts and know that it is a vast system of mental cheating. In our society, those who have the best knowledge of what is happening are also those who are furthest from seeing the world as is. In general, the greater the understanding, the greater the delusion: the more intelligent, the less sane."

It's kind of scary how real this is now. I usually hate 1984 references because they're rarely truly applicable, but now it is really starting to be the case.