Read HPMOR. Unlike what I thought it might be, the protagonist does not solve problems through pointing out logical fallacies or something. Harry Potter is a straight-up superhero who is infinitely smarter and more talented than anyone around him. It's not so much rationality as a narcissistic fantasy that goes on for hundreds (thousands?) of pages.

Even though I had been well-disposed to rationalism and read HPMOR to learn more, I could not take Yudkowsky seriously in any way after I gave up halfway through.