10 points
Elros and Elrond had a choice as to become Eldar or Edain. Elrond chose Eldar, while Elros chose Edain. Once they chose their mixed nature was resolved.
7 points
Not exactly, since the Númenóreans still had longer lives than Men due to their elven heritage. So while one could absolutely make the argument they were Men, there’s also a case to be made saying they weren’t pureblooded Men.
6 points
