9/11 conspiracy theorists responded to refutations by alleging more cover-ups.
Facts alone are insufficient to destroy a conspiracy theory, of course, and in many ways a theory’s appeal has more to do with the receptiveness of its audience than the accuracy of its details.
.. The Popular Mechanics article may never have been published were it not for a $3 million national ad campaign by an eccentric millionaire to promote a self-published book called Painful Questions. The campaign posited that the World Trade Center was brought down in a controlled demolition and that the Pentagon was never hit by a jetliner, and asked questions about whether the fires in the Twin Towers were sufficiently hot to bring about their collapse or whether the hole in the Pentagon was big enough to fit a commercial airplane. When Popular Mechanics Editor James Meigs saw the ad, he says, “I thought, well, we’re Popular Mechanics and we’ve been reporting about what happens when planes crash, how skyscrapers are built, for 100 years. Let’s actually answer the questions.”