At this stage, I took a shot of the drawing because I thought it might be finished. Elizabeth thought so, too, but decided to continue working on it. When she had all the facets of the paper bag carefully drawn (see previous post), she said, “I liked it better before.”
I’ve talked about the “Unfinished” before: https://artamaze.wordpress.com/2011/02/21/yoko-ono-and-romantic-irony/
An article on this subject appeared in the NYtimes just a few days ago, worth reading:
“The Fascination of the Unfinished, “ by Roberta Smith
http://www.nytimes.com/2014/01/10/arts/design/the-fascination-of-the-unfinished.html?hp&_r=0
All contents copyright (C) 2010 Katherine Hilden. All rights reserved.
artamaze by Katherine Hilden 
I’d be interested in seeing what happened after she continued to work on the drawing. It’s hard to know when to stop, and exactly how much conversation your viewer is willing and able to have.