The ring finger moves independently enough. You dont have zo use your entire fingers. First knuckle and up is good enough.

And tecognizibility isn't (theoretically all thst different. Up. down and perpendicular are all imho unique enough to just work.

However neither is really pf any concern here. It was just a wuick brain fart, not a suggestion thst we should do it. I don't know about you. but I don't really often feel the urge to count to particularly high numberbon my fingers