[formerly_proven]

It seems to me like most "intrapersonal communication" is not fully formed, but latent. Because everything is filled in as you go there, it seems like sentences are formed at a crazy speed and with superb proficiency. Minor errors don't matter because nothing is vocalized and the underlying processes "know what is meant" regardless. A little bit as-if internal speech is just a handle to move thoughts around, and not the actual thought itself.

[jpeloquin]

Yeah, when I speak or write out my thoughts I often find they weren't as fully formed as they seemed while they were just in my head, and maybe shouldn't have counted as thoughts in the first place. This is one reason it's beneficial in a work context to keep a project journal or regularly discuss work with other people.