When margins are wide, you could count 10% of the ballots by hand as a sanity check on what the machines are reporting. When margins are close, you could count

When margins are wide, you could count 10% of the ballots by hand as a sanity check on what the machines are reporting. When margins are close, you could count them all by hand. Pretty sure we could develop ballots that are easy for both humans and scanners to read. By using computer vision rather than whatever they had in the 1980s I'm pretty sure we could find a solution here. Even so, given the value of our democracy, I'd happily support returning to counting all ballots by hand every election.