Noun
clear and convincing evidence (uncountable)
(law) A legal standard for deciding the outcome of a dispute: evidence that clearly indicates that a claim is more likely to be true than not, without needing to eliminate all doubt.
Amending the U.S. Constitution, the document most sacred to those who love freedom and liberty, is a delicate endeavor and should be done only on the basis of the most clear and convincing evidence that a proposed amendment is necessary. Ben Nelson