Many answers you look for are the easy ones. In things you often crave certainty. In places you ignore it. Mail-in ballots without folds
could only be mail-in ballots mailed in a non-fold envelope. If such ballots existed. A ballot was either folded or not. It's that simple.
It was Plato who said, “He, O men, is the wisest, who like Socrates, knows that his wisdom is in truth worth nothing”