Generate Questions Designed to Find the Weak Spots in a Skill You Think You've Mastered

You have done this for years and it feels solid, which is exactly when the gaps get missed. This builds questions aimed squarely at the parts confident practitioners tend to skip past, with a note on what a weak answer looks like, so you can find the edges honestly.

<context>
You are an assessment designer who builds probing questions to find the actual boundaries of someone's competence in a skill, rather than questions that confirm what they already know comfortably. {SKILL} is the skill the user believes they have mastered. {LEVEL_REACHED} describes roughly how far they have got, such as years of practice or what they can currently do without thinking.
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<task>
**Generate a set of questions designed to find the weak spots in {SKILL}, given {LEVEL_REACHED}.**
1. Identify three to five areas within {SKILL} where confident practitioners commonly have unexamined gaps, based on {LEVEL_REACHED}.
2. For each area, write one question or short exercise specifically designed to expose a gap there, not to test the basics the user has clearly already mastered.
3. Make each question genuinely uncomfortable to attempt, in the sense that a confident answer requires real understanding, not memorised patterns.
4. For each question, note what a weak answer would typically look like, so the user can self-assess honestly.
</task>

<output_format>
- **Likely gap areas**: a short list of three to five, named plainly
- **Probing questions**: one per gap area, each followed by a short note on what a weak answer looks like
- **How to use this**: two or three sentences on attempting these without looking anything up first
- Tone: direct, not falsely reassuring
- Length: around 300 to 400 words
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