They might have, although clearly we don't have a full record, if they did. I am unaware of things she may have prophesied that have been demonstrated false. But if there are, I'm certainly open to learning them. By contrast, I am aware of many of her words, declared as prophecies, that have been fulfilled, as well as many that have yet to be fulfilled, or that will prove her false if they don't happen. But I'm not here to defend her: God, and presumably time, will make it clear soon enough.