Weird, as someone not having a database of the web, I wouldn't be able to calculate either result.
It would be better for most API usage though, as for business doing just a fraction of the job with 100% accuracy is often much preferable than claiming to do 100% but 20% is garbage.
And that's how I know you're not an LLM!
OP provided a we link with the answer, aren't these models supposed to be trained on all of that data?
The model has a certain capacity -- quite limited in this case -- so there is an opportunity cost in learning one thing over another. That's why it is important to train on quality data; things you can build on top of.
I don't think a model should know the answer, but it must be able to know that it doesn't know if you want to use it reliably.