I always thought it was undocumented personal gnosis. Would you feel differently if it was/is?
Yeah, re: responsibility and being clear about where your info comes from, I totally agree. The use of the "UPG" term is really only important when you're talking to other people, IMO; so *they* know and can activate discernment in their evaluation of your statements. It seems like undocumented is a little less personal than unverified though. Like undocumented says, "we just haven't found anything like this before/yet" and unverified invites more judgment.
I love the fact that the ancients didn't have a name for their "religion". I think it helps to eliminate any notion that differences put anyone on the outside.