Empirical

From EvaluationWiki

Used widely, and here, to mean a factual non-evaluative claim. In the philosophy of science it is often said to mean a claim whose denial is non-contradictory (i.e., "it has empirical content," "is not simply a logical or definitional truth"); but this is debatable because some laws that appear to be about nature and hence with empirical content, also appear to be true as a matter of definition, e.g., the first law of motion, the fundamental law of economics. The use here takes no stand on that issue.