I don't agree with the majority of you.
I used to consider myself purely of royal english descent.
In the past year however I learned that I am related to both the chieftans of the Chickasaw and the Cherokee tribes and that the majority of my family was descended from these tribes.
I called the Chickasaw tribe and LSAC who both confirmed that I can be considered Native American and in fact encouraged me to mark Native American on my applications, so I did.
My family is rich with native american culture, but until last year I was clueless.
Anyway, my point is this; a lot of you have preached that it is unethical to mark a race if you are not involved in its culture. That's crap. LSAC asks for your racial/ethnic identification. nothing more/nothing less. When your lines are blurred pick a race. If you qualify for both racial identifiers both are truthfull statements.