Comment by 3am

Just because you are willing/able to leave a company doesn't mean you advertise it. Hence "explicit" vs "tacit" in my comment. What a person says about being loyal is irrelevant, you can't assume anyone will stay long term (kind of the point). But if they go out of their way to say they're looking, then they don't want to be there and you shouldn't waste the time & resources training them up.