Duplicates

In this world twins are called duplicates, and they are about as rare as sand is in the desert, because everyone has a "twin." The only catch in this world is that only one of the twins is considered the "gifted" child. because of this the twins stay together until five years old then their memories are wiped after the researchers know who is "gifted" child. But what happens when a pair of twins are born and the gifted child is put with the lesser children. Her name is Samantha but what happens when Sam is finally old enough to realize she doesn't belong, she is to smart for her classes and is always the center of attention, even if she doesn't want it to be, because of what she is able to do because of her powers. When Sam finally get out of the school they force her and the other waste of space as the teachers call them, what happens when she gets out, runs away and finds her self right where she started only its not because even thought people looked the same their not how will Sam react? And what happens when she finds out she is gifted and not a "Waste of space child" like she has been told?