Teach with an analogy that says where it stops working

Explain [CONCEPT] to [LEARNER LEVEL] using an analogy from [FAMILIAR DOMAIN]. Provide a mapping table of three matching features, two non-matching features, and an 'expiration label' stating the question where the analogy becomes misleading. Then teach the concept once without the analogy and give a test question that probes the boundary. Do not present the analogy as proof. Check that every mapped feature reflects the real concept and that the boundary question exposes a genuine limitation.