Problem: The man couldn't lift his son because *he* was so heavy.

Do "he" and "The man" mean the same thing?

Answer: no

Problem: Lily spoke to Donna , breaking *her* silence.

Do "her" and "Donna" mean the same thing?

Answer: no

Problem: After a somewhat lengthy conversation, Nancy convinced the housekeeper that there was no immediate cause for alarm. *She* did not mention the incident at the Hamilton bus station, knowing it would only add to Mrs. Gruen's uneasiness.

Do "She" and "Nancy" mean the same thing?

Answer:
yes