Answer-first page
Unknown Words: how are weak words captured automatically?
Unknown Words creates an always-current focus pool.
Direct answer
Unknown Words automatically captures low-confidence words so review cycles stay focused.
How it works
Each signal updates priority and integrates with Mastery Flow and Review Debt.
Claim -> evidence
Unknown Words is a live behavior, not just a static filter.
Who this is for
Users who want clear next-step lists.
How is this different from favorites?
Unknown Words is signal-driven; favorites are user-curated.