Writing a forum reply, or talking to people, or reading a Wikipedia article.
For example, when I'm sorting out Logiks in my head, it's always in the form of a dialogue with someone else who's criticising what I say (but I never actually hear that person, so it's like asking and answering my own questions). Or I'll imagine that I'm writing a forum post and go over it again and again until it's vaguely coherent (this one took three days ).
I also had an experience where I had a brainwave, but the ideas were filtering through to me like I was reading them on wikipedia.
Assuming I'm not insane and on the fast track to schizophrenia, type related? Do you relate? Can you think of a function or dichotomy that would do or cause this?