Lot's of sound debunking tidbits on the collapses using logic and examination of the data, but here's some commentary I like:
A Note to Visitors
I will respond to questions and comments as time permits, but if you want to take issue with any position expressed here, you first have to answer this question:
What evidence would it take to prove your beliefs wrong?
I simply will not reply to challenges that do not address this question. Refutability is one of the classic determinants of whether a theory can be called scientific. Moreover, I have found it to be a great general-purpose cut-through-the-crap question to determine whether somebody is interested in serious intellectual inquiry or just playing mind games. Note, by the way, that I am assuming the burden of proof here - all you have to do is commit to a criterion for testing. It's easy to criticize science for being "closed-minded". Are you open-minded enough to consider whether your ideas might be wrong?
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Who Stands to Profit?
A question much asked by 9-11 truthers, who point to gold allegedly being removed from the World Trade Center, investigative files being destroyed, a pretext for invading Iraq or declaring martial law, etc.
A few months ago I agreed to be on a truther talk show (I'll try almost anything once. Almost.) and the commercial breaks were a revelation. There were endless spiels for crank medical remedies and nutritional supplements, investment schemes that ranged from shady to crazy, newsletters for conspiracy cults, and wacko theories on how to avoid taxes. One former truther who became disillusioned said he would no longer help the movement sell T-shirts and DVD's. It's a lot more than just T-shirts and DVD's. Look at the Web sites, the newsletters, listen to the talk shows and look at who's bankrolling them and advertising on them. Truther sites are to conspiracy thinkers what televangelists are to lonely Christians: a place to send money to buy a feeling of participation and fulfillment.
www.uwgb.edu/dutchs/pseudosc/911nutphysics.htm