My narrator does tell me the following: 1. Are return values identical for identical arguments? 2. Are there side effects? What are those? 3. "Congratulation

My narrator does tell me the following: 1. Are return values identical for identical arguments? 2. Are there side effects? What are those? 3. "Congratulations, this narrator here found a story that can be told in isolation!" 4. Are the variables used in close locality to their declaration 5. Are all these loops doing what I think they do? (This one requires iterations of temporary code rewrites) 6. Is the story told with high efficiency? Can some side effects be prevented?