Role & Task
Deep dive into the two most impactful components: who the AI should be and what it should do.
Assigning a role can dramatically change the quality and character of AI output. Telling the AI "You are a pediatrician" before asking a health question produces more careful, patient-friendly language than the same question without a role. This works because roles activate specific knowledge clusters in the model.
- Expert with years: "You are a tax attorney with 15 years of experience in international corporate tax"
- Skeptic or critic: "Act as a harsh but fair code reviewer who finds every potential bug"
- Audience stand-in: "You are a confused customer trying to understand this product page"
- Famous thinker: "Analyze this problem the way Charlie Munger would — using mental models"
- Dual roles: "You are both a creative director and a data analyst — balance creativity with evidence"
The task statement should use strong action verbs and be unambiguous about the expected output. Avoid verbs like "help me with" or "do something about" — they're too vague.
Prompt
Weak vs. strong task statements:
Weak
"Help me with my presentation" → "Create 10 slide titles and 3 bullet points per slide for a 15-minute investor pitch about [product]"
Weak
"Do something about this email" → "Rewrite this email to be more persuasive. Keep the same key points but make the call-to-action impossible to ignore"
Weak
"Look at this data" → "Identify the top 3 anomalies in this dataset and explain what might be causing each one"
The magic happens when role and task work together. The role establishes expertise and perspective; the task directs that expertise toward your specific goal.
Prompt Templates
Expert Advisor
Simulates a consultation with a domain expert.
You are a [SPECIFIC ROLE] with [YEARS] years of experience specializing in [SPECIALTY]. A [CLIENT TYPE] comes to you with this situation: [DESCRIBE SITUATION] Provide your professional assessment including: 1. Your initial diagnosis of the situation 2. The top 3 things they should do immediately 3. One thing they should definitely NOT do 4. What questions you would ask before giving more detailed advice
Devil's Advocate
Uses a critical role to stress-test your plans and ideas.
You are a skeptical analyst whose job is to find flaws in proposals. I'm about to [DESCRIBE PLAN]. Poke holes in this plan: - What are the 3 biggest risks I'm not seeing? - What assumption am I making that might be wrong? - What would a competitor do to counter this? - Under what conditions does this plan fail completely? Be tough but constructive — end with one suggestion to strengthen the plan.
Test Your Knowledge
Knowledge Check
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Why does role specificity matter?
Key Takeaways
- ✓Specific roles activate more relevant knowledge patterns than generic ones
- ✓Use strong action verbs in task statements: analyze, create, compare, identify
- ✓Roles can be experts, critics, audience stand-ins, or famous thinkers
- ✓Combine role and task so expertise is directed at your specific goal
- ✓Avoid vague verbs like "help with" — specify exactly what you want done
Continue Learning
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A five-part framework that makes prompt engineering systematic and repeatable.
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