What does 'substantial' mean? "of considerable importance, size, or worth.". We further constrain the definition with 'anything less than'. So what we're saying

What does 'substantial' mean? "of considerable importance, size, or worth.". We further constrain the definition with 'anything less than'. So what we're saying is, 'of an especially considerable importance, size of worth'. Okay, well, what does that mean? It has to be a number large enough to influence the election result, but there's no evidence election results have flipped elections due to enough fraudulent mail-in ballots. With this interpretation, the numeric quantity does not matter, but the impact does, yet it is still untrue.