"randomised trials" is not the gold standard of scientific evidence it just one method and there are a lots of other methods. It's used in medicine because we h

"randomised trials" is not the gold standard of scientific evidence it just one method and there are a lots of other methods. It's used in medicine because we have a very weak understanding of what's going on and it's the only method that permit us to progress in this situation : It permit us to get some useful results without having a working model of the situation.