Pretty much everyone, given the opportunity, is capable of noticing a switch or modification of paper ballots. Very few, even when given all the opportunities

Pretty much everyone, given the opportunity, is capable of noticing a switch or modification of paper ballots. Very few, even when given all the opportunities in the world, are capable of determining if something is wrong in the software or hardware in the machine. The difference is between having to trust a small group of people who have to be trusted to be experts, vs trusting that the average of random groups of people will be good enough to minimize fraud.