[jameshart]

I think that really just reflects the fact that on subjectively graded tests the score really doesn’t have that many significant figures of accuracy. That a regrading can find 3 to 5 points by being more generous - or presumably take 3 to 5 off by being harsher - says that really you could save a lot of effort by treating the final grades as bucketing into 10 point bands and treating 25-35 as the actual cutoff.

[aesthesia]

Isn't that equivalent to just setting the passing threshold to 25, with the same incentives?

[jameshart]

… which is effectively what result this process seems to produce already.