
Knowing the answer is not enough
You can know forty birds and still land in the shallows all seven times. The first answer that surfaces is the one the rest of the field also reached, because the obvious members of a category are obvious to everyone who knows the category at all. So the Krillion game separates recall from choice. You already have a valid answer in the first second. The remaining twenty-four seconds decide whether you spend them backing it or digging one level further into what you actually know.