I just plugged the question directly into DaVinci on playground, no header prompt. But yeah, now that you mention it, I’m sure there are fun and interesting headers you could build this off of.

But yeah, if the first line is a question, DaVinci will respond by answering with no guidance necessary. It will often try to answer unknown or nonsense questions with some pretty arbitrary guesses or highly speculative answers rather than a simple “idk”, but it will also usually inform you of its uncertainty as it does here. There’s actually a built-in default header prompt that is really good at forcing the AI to only answer questions when it is certain of the answer and respond “unknown” to anything else, but it’s both less fun and much less useful, as I think the deductively-reasoned answers tend to be pretty good, and it’ll respond with a fact if it knows the answer anyways.