[mrob]

I can watch an airplane fly and be confident that it's actually flying. I can watch election workers count and be confident that they're actually counting. I don't need to know why something works when I can personally observe it working.

But I can't observe the operation of an electronic voting system. All I can see is the result, and a fraudulent result looks very much like a legitimate result. I'm forced to understand it (which is likely impossible considering the complexity of modern hardware) or to trust people who have incentives to cheat me.