> He doesn’t spare himself, though. “I have a habit, which I don’t recommend, of finishing essentially every book I start,” he said. “And if I disagree with a book I spend lots of time writing notes in the margins. Perversely, this means that the more I dislike a book, the longer I spend reading it.”

http://www.nytimes.com/2016/01/03/fashion/bill-gates-the-bil...

I wonder if being "argumentative" against a book you disagree with in this way is a good antidote to confirmation bias.

One type of person might stop reading a book when it veers in a direction they disagree with and therefore end up never changing their mind.