Great overview on a topic most people don't know about.
There are even dolphins who don't know what a witness does, and even I took some time discovering... it's a mechanism that isn't explained as often as other ones - and when it is, people don't read it as they categorize it under "Boring".
Cheers
Well I'm older on the platform and only took it seriously last January but I have learned a lot and trying to share it although lately I don't have local readers .