In 1984, what are the three sacred principles of Ingsoc?

The
three sacred principles of Ingsoc are Newspeak, doublethink, the mutability of the past.
Newspeak is the official language of Oceania and the totalitarian regime's attempt to alter
human thought and completely eradicate political dissent. Each year, the Newspeak dictionary
becomes smaller and smaller as government agents delete adjectives and incendiary words while
they combine opposite words that can be used to describe contradicting thoughts.

The illogical Newspeak words directly connect to the second principle of doublethink,
which is the ability to believe two contradicting ideas simultaneously and accept whatever
information the Party declares. The Party attempts to control reality via the practice of
doublethink. Essentially, the Party can make false, contradictory claims and the public with
fully accept, believe, and embrace the information by practicing doublethink.

The third principle is the mutability of the past, which is the government's ability
to continually alter...