-http://zackmdavis.net/blog/2019/05/the-typical-set/
-> once you draw a boundary around a group, the mind starts trying to harvest similarities from the group. And unfortunately the human pattern-detectors seem to operate in such overdrive that we see patterns whether they're there or not; a weakly negative correlation can be mistaken for a strong positive one with a bit of selective memory.
-https://www.lesswrong.com/posts/veN86cBhoe7mBxXLk/categorizing-has-consequences
-[a higher-dimensional statistical regularity in the _conjunction_ of many variables](https://www.lesswrong.com/posts/cu7YY7WdgJBs3DpmJ/the-univariate-fallacy-1)
-96.8% classification from MRI https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6374327/
-]
-[the wrists: http://unremediatedgender.space/papers/yune_et_al-beyond_human_perception_sexual_dimorphism_in_hand_and_wrist_radiographs.pdf]
-[talk about mapping from one distribution to another: e.g. height]