“Do they or do they not know what “sola scriptura” means?”
I don’t know who “they” are or what “they” know or don’t know.
But I was addressing your post.
I don’t believe you understand the theological term, based on your post.
I can tell you how it’s used. Everything revealed by Jesus Christ was written down in some part of the New Testament. Any proposition or practice that is not taught in the New Testament is the invention of Popish priests, in order to further their agenda of genocide, accumulation of unimaginable wealth, world domination, and Satanism.
That’s about it, right?