Entertainers are not necessarily these things.
Just like lawyers - presidents are often lawyers - are not necessarily brilliant paragons.
If everyone was rational and didn't do what they were told, choosing to verify everything and only follow what was appropriate, then the entire marketing, ad, government, legal, prison, etc industries would all collapse because they wouldn't be necessary any more. It's fairly obvious that there are people who follow dangerous, stupid advice.
Those slave-owners held it self-evident that all men had the unalienable right of liberty (among other rights.)
I can't remember 1984 well enough to remember any specific examples of doublethink, but they can't be as good as this one.
Sorry. Who among the founding fathers was women to call it parents? Founding fathers seems to be more accurate than founder Mothers or Founding parents.