The “Hobbit”-like human was smart enough to make stone tools despite its small brain, according to research. Sharpened flints found on the remote Indonesian island where it lived suggest the human “cousin” inherited tool-making skills from its ancestors.
Some have claimed its brain was too tiny to perform the complex tasks seen as a hallmark of human culture. – BBC
Small brains do not prohibit complex behaviors. I once saw a wasp put a bug in a hole then go get a rock, come back and plug up the hole with it.