Just Smile: That’s not what I said. What I said was it could be Kiddushin in certain circumstances, even if you’re not thinking of being M’kadeish with it. Proposals almost certainly count as those situations. Learn Even HaEzer Siman 26. It’s fairly clear that giving an engagement ring with Eidim present is Kiddushin.
WIY: Rare as it is, Joseph happens to be right in this case.