I think that is the accomplishment. It progressed from not being able to give an answer because it did not have the direct knowledge to being able to make a guess based on a pattern of naming of others in the family and a clue.
Could absolutely be that. Or it is so smart that it realizes that the author believes they have given enough information and that it should not have to land on a low chance guess. So that pattern is the only one that make sense in that case.
What the author provided is not necessarily the same as what the software forwarded to the model, especially if some sort of "recall" feature is being used.
