Knowledge builds on itself. Armin lets you say so: a card can have prerequisites, other cards in the same deck that you should know first. Together, these links form the deck’s prerequisite graph.
Locked cards
A card stays locked while any of its prerequisites isn’t yet secured. Locked cards don’t appear in reviews. A prerequisite is secured once every one of its review units has graduated to review and reached the Prerequisite stability set under Settings → Learning path.
Once a card unlocks, it stays unlocked. If you later forget a prerequisite, Armin keeps scheduling that prerequisite for practice, but the cards that depend on it remain available.
Linking cards
Open a deck’s Graph to see its cards and links, and to add or remove prerequisites. Armin rejects links that would form a cycle, because a card can’t depend on itself.
Tips
- Keep prerequisites small and specific. A card that depends on one clear fact unlocks sooner than one that depends on a whole topic.
- Not every card needs prerequisites. Use them where order really matters.