@feld @lain @augustus completely different, the butterfly ballot issue was simply that the design of specific machines (mechanical, not even electronic) used mainly in florida fucking sucked and the ballot could get misaligned in the machine and get punched for the wrong candidate. the diebold concern was that electronic voting machines didn't have audit trails and the machines were incredibly easy to hack and had basically no security and very poor code.

it's not the same as optiscan or scantron, literally holes were punched in the paper, optiscan and scantron read filled-in dots.

I actually have a ton of professional experience with this. a properly run system can detect misaligned sheets because you run a specific kind of test that sees if data "looks" misaligned, because it is a thing that can happen for various reasons.