Did Bush Know About 9/11 in Advance?

Tom points us to this completely insane poll result.

Heck, I'm not even sure Bush knew about 9/11 after it happened, much less in advance. In fact, he still seems to be a little unclear on what happened--e.g., who it was who attacked us.

The real question here, though, is: what went wrong with this poll? Because it simply cannot be true that 22% of likely voters think that he knew in advance...not to mention that another 22% are allegedly not sure.

One thing that often explains such "not sure" results is that people confuse the questions:

1. Is it logically possible that x? (i.e., does x entail a formal contradiction (something of the form 'P & not-P'))

With the question:

2. Is it a real and relevant possibility that x?

That's what happened in that famous poll a couple of years back that alleged to show that some freakishly high percentage of people thought that the Holocaust might not have happened.

As Richard points out in the previous thread, if results like this were accurate, it would be extremely important, because you can't run a democracy well if the electorate can't even get clear on the most basic and obvious facts. Think about the unbelievably heavy price we've been paying for that fact that so many conservatives continue to believe that Saddam was in on 9/11, that invading Iraq was a defensive action, etc. If the figures mentioned above were true, it would seem to indicate that a very large percentage of Democrats are even more deranged about 9/11 than many Republicans are. And that would, indeed, be a very frightening thing.

(Footnote:
A desperate lunge at an explanation:
All the 9/11 conspiracy kooks have come out of the woodwork and (b/c of 9/11) turned anti-GOP, and now identify themselves as likely Democratic voters?)