A lot of S's behavior issues are rooted in her desire to be in control. Of everything. (This is, of course, not unusual with foster kids -- they've learned that they must be in control in order to survive and it is very hard for them to give up control to these strange people called the "foster family.")
Lately, this need for control is coming out as defiance. Not just in the sense of "no, I won't" when asked to do something, but also in the sense of arguing with everything and anything. Never backing down. It seems that her instinctive response to any statement --no matter what it is -- is to disagree. And to disagree loudly and rudely.
I have joked that if you tell her the sky is blue on a clear day, she will say "No, it isn't!"
Today, in the car, I got an even better example. We started the car to head to church and the radio came on. It was tuned to a local Christian station. Minutes after the car started, the radio said "You're listening to 'Keep the Faith' on ...."
Immediately, S snarled, "No, we're not!"
To the radio.
Because it is wrong about its own programming.
And S Knows All.