I have told you in the past that I love Blog 702. It is a blog of substance, written by someone who knows what they are talking about and who is willing to share what they know.
The authors of Blog 702 have started a series about the concept of "reasonable degree of medical certainty." Here are the first few paragraphs"
Quite some time ago now, we promised to respond to a Beck & Herrmann post decrying an ALI proposal to abolish any requirement that experts offer their opinions to a “reasonable degree” of medical, professional, or scientific “certainty.” (Call this the “RDC” rule for short.) The ALI proposal would abrogate any RDC requirement and demand only that the expert hold his or her opinion to be more likely true than not — at least in the context of opinions offered to prove causation in tort cases involving physical harm.