The only problem is, how do you distinguish between there being initially 11 inches of water in the jar and removing two inches and there initially being 9 inches in the jar and removing 0 inches, especially when you don't know how much was there to start, how much you removed, or how much is left in the end. While I agree you can't just use the graphs to say the stimulus was a failure, it does make one question the conclusion that 2 inches was removed if they were unable to get the initial status correct.
Get to the point! Just like Obow-man a year later you are still pointing finger to your rear! Except this time it's your brown eye pea you are pointing on because nobody is on the rear anymore!