Spaced repetition is an error amplifier
Get a fact wrong in an essay: you lose a mark. Get a fact wrong on a flashcard: an algorithm specifically engineered to defeat forgetting will now drill it into you at optimal intervals for weeks, patiently re-teaching it every time you begin to forget it.
The system does not know or care whether the card is true. It is a machine for making things permanent, and you have pointed it at an error.
And you are the person least able to notice
This is the asymmetry that makes it serious. You are studying the material *because you don't know it*. So you cannot evaluate the card. A wrong card and a right card look identical to the only person who will ever look at them.
The requirement this implies
Every AI-generated card must be checkable in one click. Not "probably right". Checkable — with a citation to the page it was drawn from, in a document you have, so that a card that looks off can be verified in five seconds rather than argued about.
A card generated from a model's general knowledge has no source, cannot be checked, and is a gamble you will settle in an exam hall. A card generated from *your* uploaded slides, stamped with the page it came from, is a completely different object.