It can be smart and not knowledgeable, as long as all the data is in the question you really don't need much in term of general knowledge, it might be even beneficial to stay on track. It mostly depend son what you do with it. For example in the doom demo I don't think you need astra level knowledge to know "enemy = bad" and "enemy is at my left = turn gun left"

Taking their spiel at face value, it's intended as a mimic of System One in humans. System One is also not smart.

Jev has a 32k context window. I doubt it's a large model.