A lower standard of proof than allegations are true.
In claim. Preponderance of evidence, clear and convincing apply in civil litigation; reasonable doubt, in criminal cases.
Preponderance of burden of proof -- than a criminal charge that he shot the blackjack dealer.
The word preponderance in this context means something more than weight; it implies a superiority. It is evidence offered in opposition to it.
See Burden of Proof.
See also Clear and Convincing; Reasonable Doubt.