They say that you don't really know you are in love, until after the fact... it is a retrospective emotion. Potty training is the same... I think we are potty trained.
I say this because as Quinn is playing, she will without annoucement or notice, go into the bathroom, close the door, pee in the potty, and come back and continue playing.
When asked, she will causually say, I peed in the potty.