Thank you, Lair, for posting the link to that post.
Yes. There are not many people (including some Sotapannas) who may not really understand what vinnana is.
– I am glad to see that the level of understanding of the people who participate at our forum here is way better than even some scholars who write books.
– They do not have any idea how important the concept of vinnana is, or even what vinnana really means.
It is not necessary to go that deep into vinnana to become a Sotapanna.
However, if one has understood vinnana at that level, one is likely to be a Sotapanna.