Logically, there shouldn't be any disputed ballots. The voting machines in Minnesota were set up so that if the machine could not determine the vote for any specific candidate or initiative, the machine would prompt the voter in case of error and to obtain a new ballot if the ballot was spoiled, e.g. over vote. So if a voter intended to not vote for a candidate, the machine would say so and the voter would have to purposely say they weren't voting.
