The other day, I sent one of my kids to bed mad at me. She wanted ice cream before bed. I said it was too late for ice cream. She said I had promised.
Had I?
I did a quick inventory of the statements I had made that evening and realized I had whispered something about ice cream to my wife, "If they hurry with their jobs tonight maybe we can give them a dish of ice cream." They hadn't hurried, it was late, and it was a school night. So she was upset-a clear indication that she was over-tired.