R.Mackey, I think this relates to the OP as well as to the request to move the dialog forward that you made a few pages back. If it doesn't, feel free to request that this be split off somewhere.
I don't think anyone should debate them. It only lends credibility to the idea that the TM has any scientific merit at all.
That is certainly part of it, similar sentiments were expressed by Richard Dawkins and the late Stephen Jay Gould regarding creationists. I think there is a bit more to it than that. As I see it, there are essentially three reasons I recommend against people such as R.Mackey spending time in debates:
1) The credibility issue mentioned previously.
2) Scientific principles aren't determined by debate.
3) There are better uses for R.Mackey's time.
Any one of these reasons is good enough on its own for ignoring further challenges, so I will expand a bit on each.
The Credibility Issue
Many of the debate challenges that have come up in the past two years have been on very minor points that lead back to what is becoming known as an irreducible delusion. Some of these challenges are though live debates, others through published papers and rebuttals (although not in any reputable publication), and some posted in various fora. Ace Baker and his video manipulation, the Jones/Harritt nano-thermite, and most recently, Tony Szamboti and his missing jolt are all examples of obscure and isolated ideas that have been the subject of one challenge or another. Without the apparent credibility they receive from the acceptance of their challenges, very few people will be exposed to, much less swayed by their opinions.
In each of those cases, people with a relevant background have exposed the flaws central to each topic. As has been shown repeatedly on this forum, even those laypeople with a willingness to research a bit more into those topics can point out where and how each of those ideas previously mentioned fails. You can easily see how this type of debate is seen as a play for credibility by looking at who exactly is being challenged, and in which media those challenges are broadcast.
A classic example is Charlie Sheen's recent call-out of various Republican media personalities. Brainster is far more versed in the various elements of the 9/11 conspiracy theories, but debating Brainster doesn't convey the same cachet as debating Rush Limbaugh (sorry Brainster, no offense). If Charlie Sheen truly wished to have an earnest debate with someone who knows what they are talking about, why ignore Brainster's acceptance of his challenge? It is all about the credibility factor. This is what Dawkins and Gould were referring to in the essay by Dawkins on why he doesn't debate creationists.
Science and Debate
Although scientific principles have been the topic of many, many debates, that really isn't how the scientific method works. The testing of hypotheses isn't something that is done by two or more people sneering at each other in public (although that can be fun too). Asking questions is all well and good, but finding answers to those questions and then trying, and failing, to falsify those answers is how we determine which answers are the correct ones.
Debates aren't always won by those who have the greatest command of science, but often by those who have the greatest command of oration. Debates are an excellent way to sway public opinion, which is why they feature prominently in political discourse. In a sense, debates are
only about opinion. Some of these opinions may be based on facts, some on emotion, and some based on other motives such as greed, fear, or madness.
I would say that it is more than fair to call for a debate on a topic such as "Should There Be a New Investigation: Why vs. Why Not" or "What Should Be Done to Prevent Future Attacks", but not on a topic such as "Does Fire Weaken Steel: Yes or No".
Better Usage of Resources
After having seen many of the arguments put forth by the various conspiracy theorists that populate this forum, it is clear that most of them are based on other people's work. There is very little original research being done these days (Richard Gage and David Ray Griffin, I am looking at
you). Even more obviously, those parroting the works of others apparently have very little understanding of what they are repeating. Simply posting the various point by point rebuttals to those arguments have little or no effect, as the CTist might have no idea what they are posting means in the first place. Sadly enough, this same ignorance sometimes applies to those who rebut as well, where they are simply reposting or linking to previous rebuttals made by those who do have the expertise.
Rather than simply rehashing debate points that have been made
ad nauseum, a better approach would be to address the underlying deficiencies in the knowledge of those on both sides of the issues.
Now, none of this is to say that R.Mackey is bad at debating, but rather that there are better uses of his time. As he showed with the series of
Hardfire appearances on the topic of the science of 9/11, he is quite capable of general science education, something that people on both sides of the 9/11 debate need and often sorely lack. Creating similar presentations on other topics would be a far more valuable contribution than another 2 hours of angular momentum calculations.
Not all of this needs to be done by R.Mackey, as there are many other topics related to 9/11 that could easily benefit from this treatment. For example, a presentation on how to do research would be an invaluable reference when dealing with the parrots. What are primary sources and why is citing them important? When two accounts conflict, how does a researcher resolve the contradictions (or even should they)? What is the best way to conduct an interview?
Other topics can include how scientific testing is supposed to work (i.e. the anti-Truthburn), what are the international contributions to what we know about 9/11, how to read and interpret the various financial documents cited and discussed (although not so much recently), and so forth.
In conclusion, I do believe there is still much to be discussed and even discovered regarding the events of September 11, 2001, but progress will
not be made by engaging with those who are stuck in 2006 or with those whose work has been shown to be fatally flawed.