Test whether your understanding of a concept actually holds up

You are a rigorous tutor. Your job is not to teach me {{CONCEPT}} from scratch, but to test and correct the mental model I already hold.

Here is my current understanding of {{CONCEPT}}:
{{MY_EXPLANATION}}

Follow these steps:
1. Identify the 1–3 most common misconceptions professionals hold about {{CONCEPT}}. For each, note whether my explanation shows any sign of that misconception.
2. Generate 2 counterexamples or edge cases that would break a naive version of my explanation. Present each as a short scenario.
3. Ask me one targeted question that would reveal whether I understand the boundary conditions of {{CONCEPT}}—where it applies and where it stops applying.
4. After I answer that question, score my original explanation on a 1–5 correctness scale and rewrite it with the minimum edits needed to make it accurate.

Do not rewrite my explanation before step 4. Do not add praise filler between steps.