Pentagon Model
Pillar 1: Role
A practical course for building clear and powerful AI prompts
The first pillar is the Role: tell the AI who to act as before it starts. An expert does not speak like a beginner. Defining the role sets tone, terminology, perspective and depth in a single move.
Core principle
A clear role steers the AI toward the style, terminology and depth of the field you chose, so the answer comes in an expert voice rather than a generic one.How to define the role well
- Pick a precise specialty, not just "expert".
- Add years of experience or a context to raise the level.
- Set the style when needed: friendly coach vs strict academic.
No role
Explain inflation.Clear role
Act as an economics professor who simplifies concepts, and explain inflation with an everyday example.Pro tip
When you dislike the result, change the role first. Swapping the role alone can transform the answer.
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Check Your Understanding (2 questions)
Question 1
In his first prompt Saud wrote 'Act as a professional expert'. What did the AI do?
💡 Why: In the run shown above, the reply opened with 'As an expert in engineering project management and contracts' - a field Saud never wrote. The second option fails because what was inferred is the topic of the question (building), not your field (quantity surveyor). The proof is that the terminology changed once the field was named, while the question stayed the same. The third option fails because 'professional' is an adjective, not a field, so it summons no terminology and no point of view. Answer quality is not bought with an adjective.
Question 2
You want to review a quote for building your house. Which Role brings you the vocabulary of contracts?
💡 Why: All three name something, and two of them do not match the task. The civil engineer's field is designing the building, not reading the scope of work in a quote, so the vocabulary you get comes from another area. 'Professional consultant with long experience' is an adjective and a span of years with no field, and years of experience showed no measured effect on this page. A Role is measured by how well the field fits the task, not by how grand the title sounds.
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