1060 karmaJoined Aug 2018


Research analyst at Open Philanthropy. All opinions are my own.


Topic Contributions

The quote continues:

Of the remaining 5 %, around 70 % would eventually be reached by other civilisations, while 30 % would have remained empty in our absence.

I think the 70%/30% numbers are the relevant ones for comparing human colonization vs. extinction vs. misaligned AGI colonization. (Since 5% cuts the importance of everything equally.) 

...assuming defensive dominance in space, where you get to keep space that you acquire first. I don't know what happens without that.

This would suggest that if we're indifferent between space being totally uncolonized and being colonized by a certain misaligned AGI and if we're indifferent between aliens and humans colonizing space: then preventing that AGI is ~3x as good as preventing extinction.

If we value aliens less than humans, it's less. If we value the AGI positively, it's also less. If we value the AGI negatively, it'd be more.

If AGI systems had goals that were cleanly separated from the rest of their cognition, such that they could learn and self-improve without risking any value drift (as long as the values-file wasn't modified), then there's a straightforward argument that you could stabilise and preserve that system's goals by just storing the values-file with enough redundancy and digital error correction.

So this would make section 6 mostly irrelevant. But I think most other sections remain relevant, insofar as people weren't already convinced that being able to build stable AGI systems would enable world-wide lock-in.

Therefore, it seems to me that most of your doc assumes we're in this scenario [without clean separation between values and other parts]?

I was mostly imagining this scenario as I was writing, so when relevant, examples/terminology/arguments will be taylored for that, yeah.

I really like the proposed calibration game! One thing I'm curious about is whether real-world evidence more often looks like a likelihood ratio or like something else (e.g. pointing towards a specific probability being correct). Maybe you could see this from the structure of priors+likelihoodratios+posteriors in the calibration game — e.g. check whether the long-run top-scorers likelihood ratios correlated more or less than their posterior probabilities.

(If someone wanted to build this: one option would be to start with pastcasting and then give archived articles or wikipedia pages as evidence. Maybe a sophisticated version could let you start out with an old relevant wikipedia page, and then see a wikipedia page much closer to the resolution date as extra evidence.)

And it would probably be a huge mistake to seek out an adderall prescription.

...unless you have other reasons to believe that an Adderall prescription might be good for you. Saliently: if you have adhd symptoms.

Depends on how much of their data they'd have to back up like this. If every bit ever produced or operated on instead had to be be 25 bits — that seems like a big fitness hit. But if they're only this paranoid about a few crucial files (e.g. the minds of a few decision-makers), then that's cheap.

And there's another question about how much stability contributes to fitness. In humans, cancer tends to not be great for fitness. Analogously, it's possible that most random errors in future civilizations would look less like slowly corrupting values and more like a coordinated whole splintering into squabbling factions that can easily be conquered by a unified enemy. If so, you might think that an institution that cared about stopping value-drift and an instiution that didn't would both have a similarly large interest in preventing random errors.

Also, by the same token, even if there is a "singleton" at some relatively early time, mightn't it prefer to take on a non-negligible risk of value drift later in time if it means being able to, say, 10x its effective storage capacity in the meantime?

The counter-argument is that it will be super rich regardless, so it seems like satiable value systems would be happy to spend a lot on preventing really bad events from happening with small probability. Whereas instabiable value systems would notice that most resources are in the cosmos, and so also be obsessed with avoiding unwanted value drift. But yeah, if the values contain a pure time preference, and/or doesn't care that much about the most probable types of value drift, then it's possible that they wouldn't deem the investment worth it.

This is a great question. I think the answer depends on the type of storage you're doing.

If you have a totally static lump of data that you want to encode in a harddrive and not touch for a billion years, I think the challenge is mostly in designing a type of storage unit that won't age. Digital error correction won't help if your whole magnetism-based harddrive loses its magnetism. I'm not sure how hard this is.

But I think more realistically, you want to use a type of hardware that you regularly use, regularly service, and where you can copy the information to a new harddrive when one is about to fail. So I'll answer the question in that context.

As an error rate, let's use the failure rate of 3.7e-9 per byte per month ~= 1.5e-11 per bit per day from this stack overflow reply.  (It's for RAM, which I think is more volatile than e.g. SSD storage, and certainly not optimised for stability, so you could probably get that down a lot.)

Let's use the following as an error correction method: Each bit is represented by N bits; for any computation the computer does, it will use the majority vote of the N bits; and once per day,[1] each bit is reset to the majority vote of its group of bits.

If so...

  • for N=1, the probability that a bit is stable for 1e9 years is ~exp(-1.5e-11*365*1e9)=0.4%. Yikes!
  • for N=3, the probability that 2 bit flips happen in a single day is ~3*(1.5e-11)^2 and so the probability that a group of bits is stable for 1e9 years is ~exp(-3*(1.5e-11)^2*365*1e9)=1-2e-10. Much better, but there will probably still be a million errors  in that petabyte of data.
  • for N=5, the probability that 3 bit flips happen in a single day is ~(5 choose 2)*(1.5e-11)^3 and so the probability that the whole petabyte of data is safe for 1e9 years is ~99.99%. And so on this scheme, it seems that 5 petabytes of storage is enough to make 1 petabyte stable for a billion years.

Based on the discussion here, I think the errors in doing the majority-voting calculations are negligible compared to the cosmic ray calculations. At least if you do it cleverly so that you don't get too many correlations and ruin your redundance (which there are ways to do according to results on error correcting computations — though I'm not sure if they might require some fixed amount of extra storage space to do this, in which case you might need N somewhat greater than 5).

Now this scheme requires that you have a functioning civilization that can provide electricity for the computer, that can replace the hardware when it starts failing, and stuff — but that's all things that we wanted to have anyway. And any essential component of that civilization can run on similarly error-corrected hardware.

And to account for larger-scale problems than cosmic rays (e.g. local earthquake throws harddrive to the ground and shatters it, or you accidentally erase a file when you were supposed to make a copy of it), you'd probably want backup copies of the petabyte on different places across the Earth, which you replaced each time something happened to one of them. If there's an 0.1% chance of that happening in any one day (corresponding to once/3 years, which seems like an overestimate if you're careful), and you immediately notice it and replace the copy within a day, and you have 5 copies in total, the probability that one of them keeps working at all times is ~exp(-(0.001)^5*365*1e9)~=99.96%. So combined with the previous 5, that'd be a multiple of 5*5=25.

This felt enlightening. I'll add a link to this comment from the doc.

  1. ^

    Using a day here rather than an hour or a month isn't super-motivated. If you reset things very frequently, you might interfere with normal use of the computer, and errors in the resetting-operation might start to dominate the errors from cosmic rays. But I think a day should be above the threshold where that's much of an issue.

I'm not sure how literally you mean "disprove", but at it's face, "assume nothing is related to anything until you have proven otherwise" is a reasoning procedure that will never recommend any action in the real world, because we never get that kind of certainty. When humans try to achieve results in the real world, heuristics, informal arguments, and looking at what seems to have worked ok in the past are unavoidable.

Global poverty probably have slower diminishing marginal returns, yeah. Unsure about animal welfare. I was mostly thinking about longtermist causes.

Re 80,000 Hours: I don't know exactly what they've argued, but I think "very valuable" is compatible with logarithmic returns. There are also diminishing marginal returns to direct workers in any given cause, so logarithmic returns on money doesn't mean that money becomes unimportant compared to people, or anything like that.

Because utility and integrity are wholly independent variables, so there is no reason for us to assume a priori that they will always correlate perfectly. So if we wish to believe that integrity and expected value correlated for SBF, then we must show it. We must actually do the math.

This feels a bit unfair when people (i) have argued that utility and integrity will correlate strongly in practical cases (why use "perfectly" as your bar?), and (ii) that they will do so in ways that will be easy to underestimate if you just "do the math".

You might think they're mistaken, but some of the arguments do specifically talk about why the "assume 0 correlation and do the math"-approach works poorly, so if you disagree it'd be nice if you addressed that directly.

Because a double-or-nothing coin-flip scales; it doesn't stop having high EV when we start dealing with big bucks.

Risky bets aren't themselves objectionable in the way that fraud is, but to just address this point narrowly: Realistic estimates puts risky bets at much worse EV when you control a large fraction of the altruistic pool of money. I think a decent first approximation is that EA's impact scales with the logarithm of its wealth. If you're gambling a small amount of money, that means you should be ~indifferent to 50/50 double or nothing (note that even in this case it doesn't have positive EV). But if you're gambling with the majority of wealth that's predictably committed to EA causes, you should be much more scared about risky bets.

(Also in this case the downside isn't "nothing" — it's much worse.)

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