Melnyk and Fineout-Overhold [4] describe an evidence table where the level of evidence is as follows (from highest to lowest rank): Systematic review of multiple random controlled trials.

Much akin to a flight of stairs, there are four principal levels of proof in a court of law – Possibility, Probability, Beyond a Reasonable Doubt, and True Certainty. The higher you go ...

Accordingly, the employer has the burden of proof on the exemption. The question then, is, what level of proof is required? In 1938, when Congress passed the FLSA, the default standard of proof in ...