25 Min Talk on MetaEthical.AI with Questions from Stuart Armstrong 2021-04-29T15:38:06.855Z
Improving Group Decision Making 2020-01-24T01:29:56.587Z
A Re-Interpretation of the Normative Foundations of Majority Rule 2019-12-13T04:09:11.618Z
New MetaEthical.AI Summary and Q&A at UC Berkeley 2019-11-24T01:47:39.117Z
Formal Metaethics and Metasemantics for AI Alignment 2019-10-08T05:37:20.826Z


Comment by June Ku on 25 Min Talk on MetaEthical.AI with Questions from Stuart Armstrong · 2021-05-01T17:14:06.632Z · LW · GW

I think the simplest intentional systems just refer to their own sensory states. It's true that we are able to refer to external things but that's not by somehow having different external causes of our cognitive states from that of those simple systems. External reference is earned by reasoning in such a way that attributing content like 'the cause of this and that sensory state ...' is a better explanation of our brain's dynamics and behavior than just 'this sensory state', e.g. reasoning in accordance with the axioms of Pearl's causal models. This applies to the content of both our beliefs and desires.

In philosophical terms, you seem to be thinking in terms of a causal theory of reference whereas I'm taking a neo-descriptivist approach. Both theories acknowledge that one aspect of meaning is what terms refer to and that obviously depends on the world. But if you consider cases like 'creature with a heart' and 'creature with a kidney' which may very well refer to the same things but clearly still differ in meaning, you can start to see there's more to meaning than reference.

Neo-descriptivists would say there's an intension, which is roughly a function from possible worlds to the term's reference in that world. It explains how reference is determined and unlike reference does not depend on the external world. This makes it well-suited to explaining cognition and behavior in terms of processes internal to the brain, which might otherwise look like spooky action at a distance if you tried explaining in terms of external reference. In context of my project, I define intension here. See also Chalmers on two-dimensional semantics.

Comment by June Ku on 25 Min Talk on MetaEthical.AI with Questions from Stuart Armstrong · 2021-04-30T12:47:14.010Z · LW · GW

My aim is to specify our preferences and values in a way that is as philosophically correct as possible in defining the AI's utility function. It's compatible with this that in practice, the (eventual scaled down version of the) AI would use various heuristics and approximations to make its best guess based on "human-related data" rather than direct brain data. But I do think it's important for the AI to have an accurate concept of what these are supposed to be an approximation to.

But it sounds like you have a deeper worry that intentional states are not really out there in the world, perhaps because you think all that exists are microphysical states. I don't share that concern because I'm a functionalist or reductionist instead of an eliminativist. Physical states get to count as intentional states when they play the right role, in which case the intentional states are real. I bring in Chalmers on when a physical system implements a computation and combine it with Dennett's intentional stance to help specify what those roles are.

Comment by June Ku on New MetaEthical.AI Summary and Q&A at UC Berkeley · 2019-11-27T22:51:20.371Z · LW · GW

Officially, my research is metaethical. I tell the AI how to identify someone’s higher-order utility functions but remain neutral on what those actually are in humans. Unofficially, I suspect they amount to some specification of reflective equilibrium and prescribe changing one’s values to be more in line with that equilibrium.

On distortion, I’m not sure what else to say but repeat myself. Distortions are just changes in value not governed by satisfying higher-order decision criteria. The examples I gave are not part of the specification, they’re just things I expect to be included.

Distortion is also not meant to specify all irrationality or nonoptimality. It’s just a corrective to a necessary part of the parliamentary procedure. We must simulate the brain’s continuation in some specific circumstance or other and that brings its own influences. So, I wouldn’t call a higher-order criterion a distortion even if it gets rejected. It’s more like a prima facie reason that gets overruled. In any case, we can evaluate such criteria as rational or not but we’d be doing so by invoking some (other unless reflective) higher-order criteria.

For the most part, I don’t believe in norms universal to all agents. Given our shared evolutionary history, I expect significant overlap among humans but that there’d also be some subtle differences from development and the environment. It may also be worth mentioning that even with the same norm, we can preserve uniqueness if for instance, it takes one’s current state into consideration.

Comment by June Ku on New MetaEthical.AI Summary and Q&A at UC Berkeley · 2019-11-27T08:58:59.623Z · LW · GW

Here, the optimal decisions would be the higher-order outputs which maximize higher-order utility. They are decisions about what to value or how to decide rather than about what to do.

To capture rational values, we are trying to focus on the changes to values that flow out of satisfying one’s higher-order decision criteria. By unrelated distortions of value, I pretty much mean changes in value from any other causes, e.g. from noise, biases, or mere associations.

In the code and outline I call the lack of distortion Agential Identity (similar to personal identity). I had previously tried to just extract the criteria out of the brain and directly operate on them. But now, I think the brain is sufficiently messy that we can only simulate many continuations and aggregate them. That opens up a lot of potential to stray far from the original state. This Agential Identity helps ensure we’re uncovering your dispositions rather than that of a stranger or a funhouse mirror distortion.

Comment by June Ku on New MetaEthical.AI Summary and Q&A at UC Berkeley · 2019-11-25T00:59:18.713Z · LW · GW

Nice catch. Yes, I think I’ll have to change the ordinal utility functions to range over lotteries rather than simply outcomes.

In this initial version, I am just assuming the ontology of the world is given, perhaps from just an oracle or the world model the AI has inferred.

Comment by June Ku on Formal Metaethics and Metasemantics for AI Alignment · 2019-11-24T02:25:17.302Z · LW · GW

I now have a much more readable explanation of my code. I'd be interested to hear your thoughts on it.

Comment by June Ku on Formal Metaethics and Metasemantics for AI Alignment · 2019-10-10T08:46:27.632Z · LW · GW

Yeah, more or less. In the abstract, I "suppose that unlimited computation and a complete low-level causal model of the world and the adult human brains in it are available." I've tended to imagine this as an oracle that just has a causal model of the actual world and the brains in it. But whole brain emulations would likely also suffice.

In the code, the causal models of the world and brains in it would be passed as parameters to the metaethical_ai_u function in main. The world w and each element of the set bs would be an instance of the causal_markov_model class.

Each brain gets associated with an instance of the decision_algorithm class by calling the class function implemented_by. A decision algorithm models the brain in higher level concepts like credences and preferences as opposed to bare causal states. And yeah, in determining both the decision algorithm implemented by a brain and its rational values, we look at their responses to all possible inputs.

For implementation, we aim for isomorphic, coherent, instrumentally rational and parsimonious explanations. For rational values, we aggregate the values of possible continuations weighting more heavily those that better satisfied the agent's own higher-order decision criteria without introducing too much unrelated distortion of values.

Comment by June Ku on Formal Metaethics and Metasemantics for AI Alignment · 2019-10-10T02:14:21.512Z · LW · GW

If you or anyone else could point to a specific function in my code that we don't know how to compute, I'd be very interested to hear that. The only place that I know of that is uncomputable is in calculating Kolmogorov complexity, but that could be replaced by some finite approximation. The rest should be computable, though its complexity may be super-duper exponentially exponential.

In the early stages, I would often find, as you expect, components that I thought would be fairly straightforward to define technically but would realize upon digging in that it was not so clear and required more philosophical progress. Over time, these lessened to more like just technical details than philosophical gaps, until I didn't find even technical gaps.

Then I started writing automated tests and uncovered more bugs, though for the most part these were pretty minor, where I think a sympathetic programmer could probably work out what was meant to be done. I think around 42% of the procedures defined now have an automated test. Admittedly, these are generally the easier functions and simpler test cases. It turns out that writing code intended for an infinitely powerful computer doesn't exactly lend itself to being tested on current machines. (Having a proper testing framework, however, with the ability to stub and mock objects might help considerably.)

There's likely still many bugs in the untested parts but I would expect them to be fairly minor. Still, I'm only one person so I'd love to have more eyes on it. I also like the schema idea and have often thought of my work as a scaffold. Even if you disagree with one component, you might be able to just slot in a different philosophical theory. Perhaps you could even replace every component but still retain something of the flavor of my theory! I just hope it's more like replacing Newtonian mechanics than phlogiston.

Comment by June Ku on PRINCIPLES OF PERCEPTION · 2019-09-18T23:37:48.854Z · LW · GW

I agree that there can be a skill involved in observation but isn’t there also a cost in attention and energy? In that case, it probably isn’t wise to try to observe anything and everything. Perhaps there are some principles for noticing when observation is likely to be worthwhile.

I also worry about generalizing too much from the example of fiction, which is often crafted to try to make nothing arbitrary. That property seems far less likely to apply to reality.

Comment by June Ku on Three Stories for How AGI Comes Before FAI · 2019-09-18T20:51:18.370Z · LW · GW

If you mean an AGI that optimizes for human values exactly as they currently are will be unaligned, you may have a point. But I think many of us are hoping to get it to optimize for an idealized version of human values.

Comment by June Ku on Physical linguistics · 2019-05-14T05:13:28.374Z · LW · GW

Both eliminative materialism and reductionism can acknowledge that consciousness is not necessary for explanation and seek a physical explanation. But while eliminativists conclude that there is no such thing as consciousness, reductionists say we simply would have discovered that consciousness is different from what we might have initially thought and is a physical phenomenon. Is there a reason you favor the former?

One might think eliminativism is metaphysically simpler but reductionism doesn’t really posit more stuff, more like just allowing synonyms for various combinations of the same stuff.

Reductionism seems much more charitable. If you can interpret someone either as talking falsely nearly all the time or as often speaking truth, even if some of what they said would need to be revised, I think you’d need a compelling reason to attribute the false claims.

Reductionism also seems necessary to make sense of our values, which often makes essential reference to consciousness. How would an eliminativist make sense of suffering being bad if there’s no such thing as conscious suffering? Strictly speaking, a classical hedonic utilitarian who is an eliminative materialist seems committed to the view that nothing really matters and everything is permitted.