If nothing was unclear or difficult, say so. Skip questions about steps you did not experience; use not applicable where appropriate.

Which question were you trying to answer?
What section was hard to find?
What summary would help?

Author notes / illustrative keys where applicable:
1. Use this answer to locate the part of the experience that needs explanation. The example issue to investigate is: readers cannot locate assumptions behind the conclusion.
2. A hard-to-find section identifies a navigation need within the document's actual content. Add descriptive headings or references to that section, without assuming a longer document is more useful or that every reader follows its sequence.
3. Turn the requested improvement into a testable next step. One illustrative action is: add an assumptions summary and clear section index.