Biomechanists use all pertinent information to determine injury mechanisms, such as in the event of a car accident. Utilizing previous clinical research, the expected recovery time -- and thus, medical expense estimates -- can be determined.
Class action lawyers have an incentive to win and to keep a case moving forward, but traditional law firms have done some first class work, too. Likewise, some class action law firms have mismanaged cases and floundered their way to a loss for their client.
None of this is to say that we need to toss all the evidence out and start at square one. Nor am I saying that the evidence supporting Wilson's account is totally false. My point is that everyone must realize that forensic science is not absolute like on television.