Boz has some interesting thoughts on writing:
I find it valuable to write even if only for my own benefit. Writing is a linear process that forces a tangle of loose connections in your brain through a narrow aperture exposing them to much greater scrutiny. In my experience, discussion expands the space of possibilities while writing reduces it to its most essential components.
Well put. In my experience, this is true. It hadn’t occurred to me that discussion can expand a thought while writing has the effect of honing it.