Don't try to send the nefarious berserker on an extra quest just for the hell of it rather than answering his questions. Especially when your only method of self-defense is punching with your little girly hands.
Maybe the next witch will be wiser.
... Downside is, I now have two amulets instead of one, since I suspect that doing this the "right" way involves her taking the un-IDed amulet and replacing it with the IDed one.