Dominion printed ballots deliberately indistinguishable from hand-marked ballots
That's from Eric Coomer, an official with Dominion Voting Systems who allegedly has strong political views favoring Antifa. He said the above during a sales pitch. So let me translate that for you.
His ballot-marking-device is deliberately indistinguishable from a hand-marked ballot. There's no way to tell a printed ballot from a hand-marked one, and this is a deliberate design decision. The claim is it preserves "anonymity" for disabled voters. The reality, in my opinion, is that it makes it difficult to separate printed ballots from hand-filled ones.
This also offers a possible motive for insisting election-day voters in Arizona use Sharpies. The printed ballot marks are designed to resemble Sharpie marks. This would make it that much harder to distinguish printed ballots from hand-filled ones.