Good article. Corollary vs causal effects. Most people fail to distinguish between them- though that is, in part, due to our evolution. You see your ancestral caveman buddy die after eating some berries- you assume the berries caused his death- and thus you avoid them. You don't know his appendix ruptured and the berries were non-toxic.. This kind of quick judgment helped us evolve- but now it tends to hurt us.
