I mean, I thought "we" did understand why they happen. It's a design decision to always provide an answer because an LLM never wants to say "I do not know". It

I mean, I thought "we" did understand why they happen. It's a design decision to always provide an answer because an LLM never wants to say "I do not know". It might sometimes say "I cannot answer that" for compliance reasons, but never "I don't know". This design decision is inherent to American culture and waht they consider as a "trustworthy person". Always having an answer is better than admitting a lack of knowledge. I don't know the technical details behind incomplete information, but I feel I know the meta reasoning behind it.