Here is the link again if you missed it:
http://www.fivethirtyeight.com/2010/...-iraq-war.html
In short, it shows that when people are asked if they are in favor of the actual content of the bill they say that indeed they are. When asked what is in the bill they do not actually know even though, as you say, there it is, right there to read.
Lies won. Truth lost.