"So you think you’re open-minded…"

Towards the end in a discussion of biases is the bit that I particularly want to point out:

... the last one I’m going to mention is probably the most important. The sophistication effect, in which the most knowledgeable and politically engaged people, “because they possess greater ammunition with which to counterargue incongruent facts, figures, and arguments, will be more susceptible to motivated bias than will unsophisticates”.

Let’s go over that again: the better-informed and cleverer you are, the more vulnerable you are to certain biases, such as motivated scepticism, because you are more able to destroy the arguments that you don’t like, but still feel no particular desire to examine the ones that you do. If you’re a politically well-informed and intelligent Corbynite, it will be amazingly simple to find the examples of Tories using it as a smear, and vice versa.

So it becomes easy to tear down silly arguments by your opponents, and so you become ever more convinced of your own brilliance and their idiocy or malignity.

I don't think in the case of journalism that something like Breitbart is a great alternative, but it seems to me that groupthink exists amongst journalists as, e.g., Nate Silver has argued. I also think that the same applies amongst academics when it comes to a number of politically sensitive subject areas.