Hilary Clinton has been telling, in her speeches, a moving story about a pregnant woman being turned away from a hospital because she wasn't insured and dying as a result. When the hospital where it was supposed to happen denied the account—according to them the woman in question was insured and was not turned away—the campaign responded by announcing that she would stop telling the story. No apology, no suggestion that she had done anything wrong, at least according to the CNN news story.
The New York senator heard the story during a campaign visit to a family's living room in Pomeroy, Ohio, in late February. Bryan Holman was hosting the candidate and told Clinton the story. She has repeated it frequently since then.
Clinton's speech accurately reflects what she was told that day, but the campaign admits they were not able to confirm the account.
Clinton spokesman Mo Elleithee said, "She had no reason to doubt his word."
Hillary is a law school graduate and, obviously, an intelligent woman. She surely knows that unsupported hearsay is weak basis for belief. Yet she repeated as fact, without checking it, a story that she had no good reason to believe was true—because it was rhetorically useful.
I don't know if such behavior falls below the usual standards for professional politicians but it is pretty good evidence that the fact she says something is little evidence either that it is true or that she believes it.