It is interesting to me how kids seem to come up with the same stuff as I did when I was a kid.
Today at breakfast, the kids are eating pancakes, I'm cooking them in the kitchen. D starts to put syrup on his pancake.
Rose: That's enough Dillon.
Dillon: [ignores her silently.]
Rose: [exasperated] That's enough Dillon! [growing more and more exasperated] That's enough Dillon! THAT'S ENOUGH DILLON!
Dillon: You're not the boss of me!
Rose: Yes I am!
Dillon: You're too bossy!
Rose: I'm not bossy! You're bossy!
At which point I start cracking up and distract them from their argument. I've never heard them argue this coherently before. Usually if they're bickering, it's over a specific item that they both want, and the vocal track hovers around the ballpark of "mine." "this is my toy!" "Mom!" etc. This is a new development, one I am sure I will tire of shortly.