I'm not sure it's "just good sense."
For example, some people see the school system failing at all its stated goals and assume the school system is broken, and they can point to institutional reasons why it's terrible. Hanson assumes it is optimized to serve other, implicit goals. I'm not convinced either viewpoint is necessarily true.
I'm not saying that assuming efficiency and looking at actual accomplishment is a wrong paradigm, or that Hanson doesn't use this paradigm frequently. What I'm saying is that 'Hansonism' involves all sorts of skeptical/cynical/outside-view approaches, and Lucius and Draco, as presented, fail almost every metric - they are obviously biased, in self-serving ways, they make and track no predictions, they do privilege their ethical views ... etc. etc. etc. (A thorough read of OB will turn up dozens of techniques and views and criteria which the House of Malfoy...
Update: This post has also been superseded - new comments belong in the latest thread.
The second thread has now also exceeded 500 comments, so after 42 chapters of MoR it's time for a new thread.
From the first thread: