I kinda don't get this. Doesn't this also potentially catch students who used Quizlet to study and happened to find this teacher's "poisoned" exam? It seems like there's a pretty decent chance that at least some of the 1/3rd of the students who profess their innocence are telling the truth. Was anything done to account for that, or was it assumed that use of the site is cheating?
> I’m neither a forensic mathematician, nor a cop, so this work took a lot of time that I would have preferred to have spent grading final essays.
If one is willing to admit that they are not a forensic mathematician they can also be willing to admit that they made a mistake with their forensic mathematics. This person seems to have over-assumed a lack of mistakes in their understanding considering the certainty with which they choose to end these academic careers.
Edit:
> As far as Quizlet goes, all I did was go to the website that is designed to facilitate cheating and set up a kind of camera to see who visited it. (emphasis mine)
So they just assume that a person using the website is cheating. One might actually make flash cards based on previous exam questions/answers using said information to be certain that their flash cards are accurate. What if that person was thinking to themselves, "This doesn't sound right, but if that's what's on the test..."?