It seems like you think PJEby was implying with his question that anyone who has read the sequences would understand qualia. I don't think that is what he actually meant.

Yeah, it seems to me that it's usually intended to ask something more like "Can I use terminology and concepts found in the Sequences without explaining them further or explicitly linking to them?", though I'll agree that we should replace "Have you read the Sequences?" with something more specific in any case. (Of course, if someone wants to claim that a particular set of posts directly answers someone's question, it's always best to point to the specific posts. Unless they depend on so much before them that it makes sense to link to an entire sequence, which is probably unavoidable sometimes.)