Question: Now suppose anyone wished to pass himself off as John or Lawrence Cavendish.
Imagine anyone wanting to impersonate John or Lawrence Cavendish.

Answer: yes

Question: These reductions in life years lost are applied regardless of the age at death.
Reductions in life years lost has nothing to do with age at death.

Answer: it is not possible to tell

Question: Justice, said the scout.
That is an injustice, the scout proclaimed.

Answer:
no