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Learn Anything: The Explanation Ladder
Understand a hard topic from intuition up to expert detail, with checks.
What you get: Four levels of explanation, analogies, misconceptions and quiz questions.
Teach me {{topic}}. My background: {{background}}.
Explain it at four levels, each building on the last: (1) a one-paragraph intuition with an everyday analogy; (2) how it actually works step by step; (3) the technical details an expert would care about, including edge cases and trade-offs; (4) current debates or open problems. After each level, give 2 questions to test my understanding (answers at the end, hidden under 'answers'). Also list the 5 most common misconceptions and why they are wrong, and the three best next things to learn. If a point is contested or uncertain, say so rather than presenting it as settled.