I usually do not debate conspiracy theorists, but I do debate their audience.
Why? Well, let’s define terms. A conspiracy is any plan by two or more people to accomplush some kind of criminal act. Naturally some conspiracies are real, from the two guys who decide to knock up a liquor store, to revolutionary moevements, to Nazi Germany’s preparations to hit Europe.
But conspiracy theorists take some well-documented event and turn it into its exact opposite. Often disregarding evidence, making phony arguments about the evidence, and making up evidence. Not to mention they give more credence to any unkown person of little or dubious accomplishments to physical or docummentary evidence.
For example, the Moon landing hoax. There are literally pounds of evidence that astronauts did land on the Moon on various occassions. Not only the countless photographs and hours of video, but also actual samples of Lunar rocks returned to Earth and analyzed and studied by hundreds of scientists since then. The conspiracy nuts (and in these cases they are nuts) try to “prove” it’s all a fake by showcasing their missunderstanding of simple physics (there are no stars visible in the photos), and their utter lack of knowledge about comaprative technologies (that the tech to reach the Moon didn’t exist, but the means to fake it convincingly did; in reality it’s the other way around). And they have to ignore the fact that many reputable geologists studied the samples. They would have to make either of two extraordinary claims: 1) the scientists were so incompetent they can’t tell a garden-variety Earth rock from a Lunar one, or 2) theya re all in on it.
The 9/11 conspiracy theories are even worse. Especially since you can cut to the chase easily thus: the buildings began to collapse exactly in the floors where the planes hit and the fires started. If they were brought down by explosives, as the conspiracy theorists claim, then there exist explosives that can 1) withstand the impact of a loaded airliner, 2) withstand several minutes of intense fire and 3) come equipped with detonators and remote systems that can also withstand all that.
Ben Franklin is attributed with a quotation that says “Two people can keep a secret if one of them is dead.” Any conspiracy or complex plan requires a measure of secrecy, and indeed it can be achieved. But Franklin only exaggerates the issue. It’s one thing for, say, the US Army to be able to conceal, for a limmited time, wehre it would invade Europe, and quite another to gather anywhere from dozens to thousands of people from various groups and expect them to keep a secret for decades.
As to why such conspiracies arise I have a hypothesis for some. There is a refusal to accept facts that are horrible (such as AIDS or the Holocaust) or merely contrary to one’s emotions (such as America being victimized or being successful). Therefore some people would rather believe AIDS is a conspiracy by someone, anyone, rather than an accident of nature caused by HIV. As to facts contrary to one’s emotions, consider the 9/11 theories. One cannot support radical Islamists or their “moderate” apologists without also embracing the practical side of the grievance-mongering, which is the mass murder of innocent victims through terrorist acts. Therefore the theory that the much maligned Islamists didn’t even commit the atrocity.