Confirmation bias

Is a tendency for people to favor information that confirms their preconceptions or hypotheses.
My bias is that the whole stroke world knows nothing, I seek out and find multiple research articles each day  that prove that.
My assumption is that the stroke world believes in 'All strokes are different, all stroke recoveries are different'. They are constantly reinforced in this belief by looking at their patients and not keeping detailed records to be able to see commonalities. 
To combat this from the Science Based Medicine blog;

Facts and rational arguments have no effect on a true believer. People hear only what they want to hear. Most people refuse to listen to anything that contradicts their beliefs. Their confirmation bias accepts only confirming evidence to protect their ego from having to admit they were wrong. And there’s a real danger in arguing with them. They will come up with rationalizations that allow them to reject everything you say, and that only serves to reinforce their beliefs. They come out of an argument believing even more strongly than when they went in.
You could tell them that you are willing to change your mind, and explain what it would take to make you change your mind. (Essentially the standards for scientific proof: positive scientific studies that are well-designed and replicated, leading to a scientific consensus of experts based on a critical evaluation of all the published evidence).