to the couple, isn’t it more likely than not that they at least canceled the light?

The other question is whether the couple said the car has “no major problems” “runs fine” or something of the like and is willing to perjure themselves. I could see a lot of (Mormon) folks feeling like playing down the cars problems “isn’t really lying” and is part of a deal, but still not be willing to lie under oath to a yes-or-no question like “did you cancel the light?” or “did you tell the purchaser that it ‘runs fine’?”

Either way I think there’s space for a preponderance. Small claims court seems to be more willing to look through the BS obfuscations anyway.