"No, you are--" said exactly like a child would, but it's with the same almost-knowing grin as before. It's the meaning behind it that counts, and they seem to be finding it funny. Or, something about the conversation is at least extremely entertaining, if true humor is too concrete a concept for them.

And their face hasn't changed, yet. Same colors, same grin, same demeanor, maybe same conversation thread still going on.

"Mm... and I don't know. We can't remember. We would go backwards... Follow backwards? But, we can't remember."