I'm half way through The Well of Ascension (This is a great series btw). Something was bugging me.
As Vin is looking for the Kandra impostor she is coming up with ways to detect it. Which is supposed to be rather difficult. OreSeur says Kandra don't use allomancy and can't even tell it's being use on them.
So, why didnt Vin just take people she suspected into a room and wham them with Brass or Zinc and see the reaction?
It would appear that she can do it in a way that is noticeable and can be strong enough a reaction would be generated.
Except in a Kandra which wouldn't know anything was happening. Easy quick Kandra detection...
Any insight on this?