With regards to Ben Goertzel, where does his AGI include anything like this not so vague utility function of yours?
You seem to think that I'm claiming that UDT's notion of utility function is the only way real-world goals might be implemented in an AGI. I'm instead suggesting that it is one way to do so. It currently seems to be the most promising approach for FAI, but I certainly wouldn't say that only AIs using UDT can be said to have real-world goals.
At this point I'm wondering if Nick's complaint of vagueness was about this more general usage of "goals". It's unclear from reading his comment, but in case it is, I can try to offer a definition: an AI can be said to have real-world goals if it tries to (and generally succeeds at) modeling its environment and chooses actions based on their predicted effects on its environment.
Goals in this sense seems to be something that AGI researchers actively pursue, presumably because they think it will make their AGIs more useful or powerful or intelligent. If you read Goertzel's papers, he certainly talks about "goals", "perceptions", "actions", "movement commands", etc.
You seem to think that I'm claiming that UDT's notion of utility function is the only way real-world goals might be implemented in an AGI. I'm instead suggesting that it is one way to do so. It currently seems to be the most promising approach for FAI, but I certainly wouldn't say that only AIs using UDT can be said to have real-world goals.
Then you having formalized your utility function has nothing to do with allegations of vagueness when it comes to defining the utility in the argument of how utility maximizers are dangerous. With regards to it being...
-- Nick Szabo
Nick Szabo and I have very similar backrounds and interests. We both majored in computer science at the University of Washington. We're both very interested in economics and security. We came up with similar ideas about digital money. So why don't I advocate working on security problems while ignoring AGI, goals and Friendliness?
In fact, I once did think that working on security was the best way to push the future towards a positive Singularity and away from a negative one. I started working on my Crypto++ Library shortly after reading Vernor Vinge's A Fire Upon the Deep. I believe it was the first general purpose open source cryptography library, and it's still one of the most popular. (Studying cryptography led me to become involved in the Cypherpunks community with its emphasis on privacy and freedom from government intrusion, but a major reason for me to become interested in cryptography in the first place was a desire to help increase security against future entities similar to the Blight described in Vinge's novel.)
I've since changed my mind, for two reasons.
1. The economics of security seems very unfavorable to the defense, in every field except cryptography.
Studying cryptography gave me hope that improving security could make a difference. But in every other security field, both physical and virtual, little progress is apparent, certainly not enough that humans might hope to defend their property rights against smarter intelligences. Achieving "security against malware as strong as we can achieve for symmetric key cryptography" seems quite hopeless in particular. Nick links above to a 2004 technical report titled "Polaris: Virus Safe Computing for Windows XP", which is strange considering that it's now 2012 and malware have little trouble with the latest operating systems and their defenses. Also striking to me has been the fact that even dedicated security software like OpenSSH and OpenSSL have had design and coding flaws that introduced security holes to the systems that run them.
One way to think about Friendly AI is that it's an offensive approach to the problem of security (i.e., take over the world), instead of a defensive one.
2. Solving the problem of security at a sufficient level of generality requires understanding goals, and is essentially equivalent to solving Friendliness.
What does it mean to have "secure property rights", anyway? If I build an impregnable fortress around me, but an Unfriendly AI causes me to give up my goals in favor of its own by crafting a philosophical argument that is extremely convincing to me but wrong (or more generally, subverts my motivational system in some way), have I retained my "property rights"? What if it does the same to one of my robot servants, so that it subtly starts serving the UFAI's interests while thinking it's still serving mine? How does one define whether a human or an AI has been "subverted" or is "secure", without reference to its "goals"? It became apparent to me that fully solving security is not very different from solving Friendliness.
I would be very interested to know what Nick (and others taking a similar position) thinks after reading the above, or if they've already had similar thoughts but still came to their current conclusions.