Food for Thought

What if we developed a rating scheme, where the judge assigned a grade to scientific evidence for the jury's benefit? There could be a jury instruction:

A grade of A means there is significant scientific agreement on the evidence.
A grade of B means that although there is scientific evidence supporting the claim, the evidence is not conclusive.
A grade of C means the court has determined that the scientific evidence supporting the testimony is limited and not conclusive.
A grade of D means the court has concluded that only very limited and preliminary scientific research supports the evidence.

It's a good enough system, apparently, for health claims about food, under new FDA regulations. Here's the Washington Post story.