On 9/11 Truth Awakening I posted a blog about "The Backfire Effect" which I have seen referenced in a few other places. Here are some excerpts.
There is an interesting article: “The Backfire Effect“, by David McRaney, cross-posted on OpEdNews with the subtitle: Why Showing People the Truth Sometimes Makes Them Believe BS Even More. This is interesting not just because of the article, but the reaction in comments that follow.
It starts out well enough, citing a recent study previously mentioned in this blog, conveniently summarized:
The Misconception: When your beliefs are challenged with facts, you alter your opinions and incorporate the new information into your thinking.
The Truth: When your deepest convictions are challenged by contradictory evidence, your beliefs get stronger.