for how important this one is I'm embarrased by the poor explication here. I could excuse it by saying something like "it's in the nature of specters to evade precise or even imprecise definition," but that's a cheap way out. Or maybe its because we (I?) were talking out of our hat or way out ahead of ourselves or otherwise full of it, and in reality -- meaning: in Drupal -- there's no getting around ontologies. Revise or trash?
