Make instructions understandable to a first-time user

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I want to make instructions understandable to a first-time user. Find assumed knowledge and replace it with observable actions.

Use these inputs:
Instructions: [Add instructions]
User context: [Add user context]

Create: Beginner-friendly procedure.
Separate supplied facts from assumptions. Ask only for missing information that changes the result.
Make the result specific enough to use and include a short way to check or improve it.