True. It's always going to be difficult to identify all the causes of an accident with the conflicts of interest. Just getting the 40% number was very difficult

True. It's always going to be difficult to identify all the causes of an accident with the conflicts of interest. Just getting the 40% number was very difficult – number of fatalities with non-zero blood alcohol is easy to find but number of accidents with alcohol present gets political way too fast (which I find informative as the US starts to debate autonomous vehicles).