That's how we learn.What would be even better is if folks who "heard a long time ago" but don't know or have who haven't got any experience in the question they're trying to answer would just not answer at all. A recent thread comes to mind where someone "heard" that fertilized eggs have naturally occurring penicillin. Such a load of BS. If you don't know, don't have the experience, or haven't bothered to research the topic, just shut up!! Your misinformation is not helpful to anyone.
We have to disprove to determine fact.