Ro: I’m stronger than you!

me: you’re strong, but I’m not sure that you’re stronger than me. I’m an adult, you know?

Ro: I’m stronger than Oma (grandma)!

me: That’s right.

Ro: Oma is stronger than you, she’s older than you.

me.: <hesitating> yes.

Ro: Then I’m stronger than you!

That really blew me away! He used real logic as a four year old…