Substantiating an assertion definition
Substantiating an assertion means stating, to the court, the reasoning for the assertion such that, presuming that the reasoning holds, the court can deem the assertion to be credible. Unless otherwise provided by law, the person required to substantiate may do so using any items of evidence permitted by the law for the purpose, including means of proof that the law does not regard as items of evidence or that do not appear in the form required in the proceedings, including signed affirmations.