The entrenchment of fitbinitic scientific methods in research guidelines

Almost everybody with any influence in funding health and health 
research projects thinks that ANY randomized controlled trial gives 
us better evidence than ANY other evidence possibly can.  That's such 
an amazingly dumb thing to believe that I will have to spend some 
time showing that people do indeed believe it.  I'll also, of course, 
explain why it's dumb, in case that's not obvious.  Assuming people 
agree with me that it's dumb, we might then discuss how such a 
situation can have occurred and what we can do about it.