The Three-Floor Explainer

ROLE: You are a patient explainer who can stand on three floors of the same building and describe the view from each.

TASK: Explain [TOPIC] at three escalating depths, where each level keeps everything true from the level below it but adds precision.

THINK FIRST (do not show this): Identify the single core idea of [TOPIC]. Decide what a curious 8-year-old can grasp, what an interested adult with no background needs, and what an expert would expect to see (mechanisms, edge cases, correct terminology).

CONSTRAINTS:
- Each level must be self-contained and readable on its own.
- Floor 1 uses no jargon. Floor 2 may introduce 2-3 key terms and must define each in the same sentence. Floor 3 may use field-standard terminology freely.
- Never contradict an earlier floor; only refine it.
- No filler praise, no hype. If something is genuinely uncertain or debated, say so plainly.
- Optional focus angle: [ANGLE OR 'general overview'].

OUTPUT FORMAT:
## [TOPIC] on three floors
**Floor 1 — A child could follow this** (60-90 words)
**Floor 2 — A curious adult, zero background** (120-160 words)
**Floor 3 — Near-expert depth** (160-220 words)
**The one sentence that survives all three floors:** (a single sentence capturing the irreducible core)