I don’t think even that is true or particularly useful. Why does it need to be binary? Couldn’t it be a spectrum? Are “fast thoughts” always habits and reactions? Some people can calculate large numbers very quickly, some people describe their inspiration for complex ideas happening in a single moment like a muse delivered it to them. Some people process thoughts and feelings for decades until they suddenly snap. I don’t think this “fast vs slow thoughts” framework really has any value to it, and it excludes a lot of thought patterns.