The Craft of Writing: Description

On another venue,  some writers (I among them) got to talking about description.  Since it's Sunday, and I don't (usually) work on the book on Sunday (only if it ambushes me) I feel moved to talk a little about description--what it can and can't do, and how it's different for the modern reader whose visual memory is full of picture-images.

Humans vary in their neurological wiring--some are more visual, some more auditory, some more tactile in their preferred learning mode.  This has implications