When told, "only room for one person OR one animal", it's also the only one to recognise the fact that the puzzle is impossible to solve. The farmer can't take any animals with them, and neither the goat nor wolf could row the boat.
> When told, "only room for one person OR one animal"
In common terms suppose I say: there is only room for one person or one animal in my car to go home, one can suppose that it is referring to additional room besides that occupied by the driver. There is a problem when we try to use LLM trained in common use of language to solve puzzle in formal logic or math. I think the current LLMs are not able to have a specialized context to become a logical reasoning agent, but perhaps such thing could be possible if the evaluation function of the LLM was designed to give high credit to changing context with a phrase or token.