While we can ask these interesting theoretical questions, we don't want to read all news from all sources. A little of it is real, serious, quality journalism;

While we can ask these interesting theoretical questions, we don't want to read all news from all sources. A little of it is real, serious, quality journalism; a bunch is middling; another large bunch is lies and propaganda; another bunch is bad for many other reasons. There's no way to prove objectively which sources are better but we still have to make judgments. The judgment about Breitbart is not a difficult one.