Problem: The cat was lying by the mouse hole waiting for the mouse , but *it* was too impatient.

Do "it" and "the mouse" mean the same thing?

Answer: no

Problem: The lawyer asked the witness a question, but *he* was reluctant to repeat it.

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

Answer: yes

Problem: Thomson visited Cooper 's grave in 1765. At that date *he* had been dead for five years.

Do "he" and "Thomson" mean the same thing?

Answer:
no