Today you had to leave for a while. It's vacation, so the boys were home, but they're old enough to be trusted while you run errands for a couple of hours.
Most of the time.
When you got home, you noticed the door to your office was open. You normally don't make a huge deal about locking it, but you do always make sure to shut the door, in order to keep the animals out.
Before you can do any investigating, Tommy comes up to you and tells you that he was in your office - against the rules - using your computer without permission - against the rules - with a soda pop - against the rules - and it spilled.
"I know you have to punish me, but I'm really sorry, Dad."
"That's not true," David says as he comes rushing up. "I did it."
You separate the boys, but they both cling to their story. Since both of them prefer the same flavor of soda pop, you can't even taste the keyboard to see who did it. They both insist it was them, and not the other boy. Normally, several (fairly minor) violations like this would result in a pretty sore bottom, and probably a loss of computer time. What's happening this time?
(Oh, and as far as you can tell - both of them really do seem upset and contrite, not like they're trying to manipulate you).