alt Hacker NewsKnowing one is manipulated, requires having some trusted alternate source to verify against.
If all your trusted sources are saying the same thing, then you are safe.
If all your untrusted sources are telling you your trusted sources are lying, then it only means your trusted sources are of good character.
Most people are wildly unaware of the type of social conditioning they are under.
I get your point, but if all your trusted sources are reinforcing your view and all your untrusted sources are saying your trusted sources are lying, then you may well be right or you may be trusting entirely the wrong people.
But lying is a good barometer against reality. Do your trusted sources lie a lot? Do they go against scientific evidence? Do they say things that you know don’t represent reality? Probably time to reevaluate how reliable those sources are, rather than supporting them as you would a football team.