fair enough -- this is my caution against the logic "I can think of a risk, therefore we need to worry about it!" It seems that SIAI is making the stronger claim that unfriendliness is very likely.
My personal view is that AI is very hard itself, and that working on, say, a computer that can do what a mouse can do is likely to take a long time, and is harmless but very interesting research. I don't think we're anywhere near a point when we need to shut down anybody's current research.
Consider marginal utility. Many people are working on AI, machine learning, computational psychology, and related fields. Nobody is working on preference theory, formal understanding of our goals under reflection. If you want to do interesting research and if you have the background to advance either of those fields, do you think the world will be better off with you on the one side or on the other?
[...] SIAI's Scary Idea goes way beyond the mere statement that there are risks as well as benefits associated with advanced AGI, and that AGI is a potential existential risk.
[...] Although an intense interest in rationalism is one of the hallmarks of the SIAI community, still I have not yet seen a clear logical argument for the Scary Idea laid out anywhere. (If I'm wrong, please send me the link, and I'll revise this post accordingly. Be aware that I've already at least skimmed everything Eliezer Yudkowsky has written on related topics.)
So if one wants a clear argument for the Scary Idea, one basically has to construct it oneself.
[...] If you put the above points all together, you come up with a heuristic argument for the Scary Idea. Roughly, the argument goes something like: If someone builds an advanced AGI without a provably Friendly architecture, probably it will have a hard takeoff, and then probably this will lead to a superhuman AGI system with an architecture drawn from the vast majority of mind-architectures that are not sufficiently harmonious with the complex, fragile human value system to make humans happy and keep humans around.
The line of argument makes sense, if you accept the premises.
But, I don't.
Ben Goertzel: The Singularity Institute's Scary Idea (and Why I Don't Buy It), October 29 2010. Thanks to XiXiDu for the pointer.