Ok, how about this? https://www.sciencedaily.com/releases/2012/02/120202151713.htm https://www.sciencedaily.com/releases/2012/02/120202151713.h... "Hand counti

Ok, how about this? https://www.sciencedaily.com/releases/2012/02/120202151713.htm https://www.sciencedaily.com/releases/2012/02/120202151713.h... "Hand counting of votes in postelection audit or recount procedures can result in error rates of up to 2 percent, according to a new study from Rice University and Clemson University." If you've got 100k votes to recount, you might have up to 2000 errors, according to this research.