Sophia: Ethan, stop arguing.
Ethan: We're not arguing. We're bickering.
Sophia: Ethan, bickering means arguing.
Ethan: Yeah, but we're still not arguing. We're bickering.
Later in the day...
me: So, Ethan, what's the difference between bickering and arguing?
Sophia: They're not the same?
Ethan: Yes, they are!
LOL
It reminds me of Monty Python's argument clinic sketch.