explain-concept.txt
Explain <concept> to me. I'm building <what> and I've hit it.

In this order:
1. What problem does this exist to solve? What did people do before it?
2. The simplest possible correct explanation. An analogy is fine, but
   tell me where the analogy breaks down.
3. A concrete example from my situation, not a generic one.
4. What people get wrong about it, and why.
5. What I can safely ignore for now.

Assume I can read code but don't know the vocabulary. Don't tell me
it's simple.

Point 5 saves the most time. Most concepts have a large surface area and a small part you actually need this week.