Authoritarians tell the truth about the future. They speak openly about what they are going to do. When they say things that seem absurd — we’ll build walls, ban those people, and so on — believe them.
Authoritarians lie about the past. They lie about the consequences of what they have done. They lie about the magnitude and scale of their achievements. No failure can be allowed. Everything is a success! Number one!! The best! Think North Korea.
Source: Umair Haque