Causality is extremely difficult to prove in all sorts of reasonable circumstances, much less the Rube Goldberg mess of horrible chemistry that is the human cor

Causality is extremely difficult to prove in all sorts of reasonable circumstances, much less the Rube Goldberg mess of horrible chemistry that is the human corpus. (See also for example Judea Pearl's work http://causality.cs.ucla.edu/blog/ http://causality.cs.ucla.edu/blog/ )