My son once argued when I told him to go play his game. The day prior I had told him he was grounded from it for a week, but I had spoken harshly and thought that was extreme. The following day i told him he could play for one hour and he argued that I told him he couldn't play for a week, stating that "You aren't being very consistent, Mom" Aaaarrgggg.

That isn't even the beginning of the arguments he has with me. I haven't quite found a way to deal with them, but I sympathize.