Just read about that. "MIND READING" is it call on my book. Once you notice the thought (mind reading) you can replace it for another more supportive to the goal of fluency. I think replace is better than block. The thing about blocking is that the thought tries to come back and back. It´s a forever going task. When you have replaced it there a new pathway that operates. A higher and more supportive road. That is fluency for me.