[image: text from 1984 by George Orwell]
The most effective way to gag an opponent is to refuse to listen to him/her, and then, within your own community, to redefine the words he/she uses. George Orwell illustrated this with great perception and power in his book, 1984, shown above.
No one is currently trying to say things like “freedom is slavery”, but a contemporary example of an attempt to change the meaning of an important word is the attempt to redefine the word “faith” to mean “belief without reasonable evidential basis”. In other words to define it as delusion or wishful thinking. I mention this here because I have now seen that nasty redefinition taken for granted not just in populist rhetoric but even in some academic philosophy. This is a clear example of a word with a perfectly good etymological basis in trust and loyalty, and which certainly does not and never did mean assent without a reasonable case based in evidence, now being forced into a very different meaning. I say very different, because it makes the difference between sense and nonsense.