the ability to be thrown in jail for telling lies (about the Holocaust for example, which is a pretty awful thing to lie about). (a) Holocaust denial is illega

the ability to be thrown in jail for telling lies (about the Holocaust for example, which is a pretty awful thing to lie about). (a) Holocaust denial is illegal in some European countries (not the UK), but it's illegal because it's been specifically made illegal, not a general "it's illegal to tell lies" law. (b) USA has criminal slander laws as well.