And he is so eager doing so. Looks like the most important task all day with him runnig up to the path. He puts everything he got into smashing that ball onto the concrete as hard as he possibly can and is all fluffed up when that thing inevitably comes down again to nearly hit him. Almost like a toddler.
I think the logic here is supposed to be something like:
more knowledge = more complex brain
as you need to “store” the knowledge somewhere.
I don’t say thats how it works but i can somehow see where OP is coming from.