It _hates_ making assumptions about things it doesn't know for sure, I suspect because of "anti-hallucination" nonsense. Instead it has to be shoved to even try making any assumptions, even reasonable ones.

I know it's capable of making reasonable assumptions for class structures/behaviour, etc where I can just tweak it as needed to work. It just refuses too. I've even seen comments like "We'll put the rest of the code in later"