From a recent trip, at my parents' house:

I walk into Pete's room and find him climbing up onto the bed,
which is piled with stuff and way too high for him.

E: Pete, what are you doing?
P: Getting on the bed.
E: Why?
P: There are some sheep behind it.
E: How did they get there?
P: I don't know.

[E climbs onto the bed]

E: I see the sheep, Pete. You must have thrown them there.
Please don't throw toys in this room, Pete!

[Carolyn enters]

P: I didn't throw them. I dropped them.
C: What's the word for someone who argues finely like that?
E: A casuist?
C: Yes.
P: Papa, you're a casuist!
E and C (in striking unison): No, Pete. YOU are a casuist!
P: But Papa's the one who's arguing!