Explain Like I'm 5 to Expert Spectrum

Explain {{concept}} at these 5 levels of complexity:

1) **To a 5-year-old child** — use analogies from everyday life, simple words only
2) **To a high school student** — introduce proper terminology, real-world relevance
3) **To a college student studying the field** — technical accuracy, key frameworks
4) **To a graduate researcher** — nuances, current debates, cutting-edge developments
5) **To the world's leading expert** — challenge assumptions, propose novel angles

Each explanation should:
- Use vocabulary appropriate to that level
- Include one example or analogy unique to that level
- Be 3-5 sentences long
- Build on the previous level without repeating