1984

by George Orwell

contradictions are not accidental, nor do they result from ordinary hypocrisy; they are deliberate exercises

This is an important part of reconciling the 2 very differing realities of what the party tells people vs the reality in the book. Winston struggling with this mentally and his battle for seeking rational logic in an otherwise irrational and illogical feedback loop and his deliberate attempts at taking it in are quite interesting.