The vaguer the prophecy the harder to defy. It's not like Anduin's being given a choice between doing or not doing a thing. We're simply told he'll offer three lies.
Sure he has. I don't care to look over every little thing Anduin has ever said, but I'm sure he's said something that technically isn't true.
It's up to you to dig through it all and find the misinformation he might be giving entirely because he himself is misinformed.