Everything had already happened by then. The idea she should have assumed her parents lied to her and then taken a test for geneology purposes as soon as was possible to the public which wasn't until she was already in her mid 40's is patently ridiculous.
Hidden in this thread is an article where some of her family members deny this was ever part of the "family history". I looked it up and here is an article
Warren’s extended family has mixed opinions on the Native American question. The stories shared by Mapes, as well as Warren’s brothers and a number of her cousins, echo Warren’s assertion. But other cousins, some of whom also do not know Warren, say they know nothing of Native American blood in the family. According to one family biography, on file at the California State University at Fullerton, one of Warren’s relatives once shot at an Indian.https://www.boston.com/news/politics/2012/09/15/elizabeth-warren-family-native-american-heritage
Months after the political flare-up, Warren and some of her family members remain unwilling to provide details on the subject. In a lengthy interview, Warren referred to stories about her roots that she says were frequently told at family gatherings in her native Oklahoma, but declined to share virtually any of them. “I knew it was part of our family,’’ Warren said. “It was part of what we talked about. . . . It was just part of who we were.’’
Warren’s family, including cousin Mapes, have no documentation of Native American affiliation, nor is there evidence that they are listed on any official tribal roll. While Senator Scott Brown, Warren’s opponent, has used this to question her truthfulness, many who assert such heritage are unable to document it, according to several scholars. During the late 1800s and early 1900s, many Native Americans did not join tribal rolls for a host of complex reasons, including residency requirements, fear of discrimination, and opposition to land allotment policies.
In the absence of documentation, the family’s link to any Native American tribe is a matter of narrative inheritance or folklore, as Warren puts it. Even if Warren has some degree of Native American blood, it is unclear if it would meet conventional standards of what constitutes a minority.
So some family members, agree with it and some do not. Some feel ashamed of it, and would never admit it if they did. If you read the article you will see some are adamant and some think it is nonsense. Family folklore can be wrong, too. This seems further back than the family stories indicate.But one should not check the box on an application based on family folklore.
So for you it comes down to skin color even though skin color has nothing to do with ethnicity. Take a trip to Argentina and she all the blonde haired and blue eyed people there. Go to Puerto Rico and see all the white people there. Go to Turkey and see all the white, Muslim, middle easterners there. Stay in America and see all the white Native Americans here.
Wonder if they have more than 1.8% DNA?
One thing this tribalism has done is that people are willing to defend the ridiculous. They almost feel they have to, defend their tribe even in the face of clear evidence.