Based on comments here I guess in addition to having no internal monolog, I also have no "mental images."
I can imagine how a specific voice sounds, or singing, etc.; and I can summon a vague visual impression of something,
But ITT people are describing a level of detail I can't comprehend. I have no images I can "study" and I can't solve visual puzzles in my head. I can't rotate arbitrary objects and tell you the shape of their outline.
I guess some of you can do this? Jealous AF.