But isn't this extremely exhausting and time-consuming? And if it indeed works this way, then where do you think the idea you are trying to formulate in your inner monologue comes from?
There are some things that are explicitly visualized, like an object I'm thinking about, where I wouldn't say in my head "I am imagining the sun. It is bright. Etc. etc.". I'd just picture the sun, and my "narrative" would probably be about why I was thinking about the sun, not describing it.
Same applies for more abstract concepts, just without the visualization.
Perhaps experiments using techniques such as PET scans might reveal if there is something more characteristically linguistic going on in those of us who feel we have an internal monologue.
Are people with internal monologues incapable of understanding things they can't verbalize? Or is it that their brain just instantly verbalizes thoughts after the thoughts have already been formed? The latter seems a bit more likely to me, but I imagine it must be very lossy at times. (That is, the verbal monologue is merely a summary of the thought.) I often have thoughts that take only an instant, but would take many sentences to verbalize.
I would say that my internal monologue is kinda a summary, and is a bit lossy.
> I often have thoughts that take only an instant, but would take many sentences to verbalize.
I would not say that my internal monologue happens at speech-speed either, it can be much faster, and the actual idea or thought is still instantaneous. The monologue is more about rationalizing or understanding your thought.
Let me ask you this though: how do you know you understand it? If you've never rendered your idea into language, or seen/heard it put that way, then it has never been criticized or vetted by anyone else.