Elizabeth Warren’s path to presidential candidate began with a fateful firing. It’s a story the Democratic senator from Massachusetts has told often on the campaign trail: In 1971, after her first year of teaching as a speech pathologist with the Riverdale Board of Education in New Jersey, Warren got pregnant and was subsequently let go. “By the end of the first year, I was visibly pregnant, and the principal did what principals did in those days: wished me luck, showed me the door, and hired someone else for the job,” Warren said at a town hall in Oakland this past June. Her teaching dreams dashed, Warren went on to law school, professorship, and public service.

But as Warren surges in the polls, people are attempting to contradict her story. Citing records—namely, minutes from an April 1971 Riverdale Board of Education meeting—the conservative Washington Free Beacon reported on Monday that Warren’s second-year teaching contract was approved, but two months later, in a June board meeting, members accepted Warren’s resignation “with regret.” Separately, Meagan Day, a writer for the Democratic socialist quarterly Jacobin (both Day and Jacobin support Bernie Sanders) suggested on Twitter that Warren had changed the details of her departure, pointing to a 2007 academic interview in which Warren, then a Harvard Law professor, indicates she left on her own.

“I worked in a public school system with children with disabilities. I did that for a year, and then that summer I didn’t have the education courses, so I was on an ‘emergency certificate,’ it was called,” Warren said at the time. “I went back to graduate school and took a couple of courses in education and said, ‘I don’t think this is going to work out for me.’ I was pregnant with my first baby, so I had a baby and stayed home for a couple of years.”

I say there are attempts to contradict Warren because neither of these purported pieces of evidence actually refute her story. Speaking out about the allegations that she is misrepresenting the truth—both of which, it should be noted, come from political opponents—Warren does not dispute the Free Beacon report. She told CBS News yesterday that she was, indeed, initially offered a job for a second year of teaching in Riverdale in April 1971, but at that point, she also said she was hiding her pregnancy from the school, as so many of us do during early pregnancy—or even longer—at work.