Yes, I’m very familiar. I have no inner semantic articulation whatsoever. When I hear people talk about meditation (clearing your head, etc.) it always amuses me, because that's my normal state. It's completely still up there...

But it’s more than that. I don’t have any conscious notions of thought at all. It’s much more like these guys in the tv show Severance who stare at numbers until “it feels right”.

The end result just pops into my head, often just as a feeling, not even as anything graspable, and only takes semantic shape when I say it out loud or write it. And even when I write it, it continues — it’s like a constant irking feeling of calibration that never feels quite right until it does.

There is one exception: demi-sleep is the only state where I can ruminate (e.g. stress-related), but then it's also non-verbal -- more like a combination of images and sensations. It's hard for me to put into words (no pun intended)...