In the sentence "I asked all 5 of them, none [knows/know] the answer", should I use the plural or singular verb?
For reference, I found this website that explains it: https://editorsmanual.com/articles/none-is-or-are/
Unfortunately, all examples given were "none of", and not one of them was about the actual "none".
I also tried to ask on Quora, but my question kept being modified for some reason, so I'm asking for help.