sw
I dunno. When I'm looking for something, I'll sometimes take a break and get in a different frame of mind before going back over the same ground. I can't count the number of times something I overlooked was staring me in the face the whole freepin' time. Granted, this different, but I would think searchers would cover the same plausible ground twice, if possible, even if they have nothing new that would bring them back to a place.