I don’t know if there is, but the forgetting process follows the https://en.wikipedia.org/wiki/Forgetting_curve https://en.wikipedia.org/wiki/Forgetting_curve

I don’t know if there is, but the forgetting process follows the https://en.wikipedia.org/wiki/Forgetting_curve https://en.wikipedia.org/wiki/Forgetting_curve Ali Abdaal claimed in one video that memories are strengthened more when something is only just remembered than when it is easily remembered, so as late card prompt as you can get, before actually forgetting. I don’t remember his source for that. And there’s simply limited time, a thing which repeats wrong answers more but not as much as you need is wasting your time and a thing which doesn’t reduce correct answers as quickly as possible is having you waste time reciting things you know. So there seems to be room for ways to rank different algorithms.