“and the core problem is that it is impossible in most cases to prove which is which to a legal degree of certainty. “
Especially when judges just dismiss the cases and you don’t have, can’t get, the evidence. Extremely difficult to WIN cases or gets convictions without a judge compelling discovery or issuing search warrants.
That means that not only is fraud inevitable, but that most of it will not and cannot be detected or proven in court.
The primary election reform goal should be to minimize absentee and early voting.