Mistake log
Record the cause, learn the method.
Don't memorize the answer — classify why you missed it (A · B · C), then write the method you'll use next time. Everything stays in this browser.
How it works: type the question or error topic, pick the root-cause class below, and write the reflection method. Stored locally in this browser (localStorage) — clearing your browser data removes it.
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wrong entries
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most wrong topic
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top cause
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Mistake review
Random prompt from your log — read the method, not the answer.
Click "Next Review" to load a mistake.