fwiw, warren has run a dishonest campaign from the start, and i'm far more inclined to believe that she's lying for sympathy votes than that bernie is trying to avoid getting into hot water over this.
so, i don't have any problems telling elizabeth warren she's a liar, because there's quite a bit of evidence that she's lied about all kind of other things.
that said, i wasn't there. i can't know.
but, it's not enough to just believe her because she's a woman, and that kind of thinking has no place in the modern world.