## Posts

## Comments

**abhimanyu-pallavi-sudhir**on The Extraordinary Link Between Deep Neural Networks and the Nature of the Universe · 2020-09-04T09:11:08.491Z · LW · GW

Aren't you just talking about implied priors? AFAIK no one has calculated the implied prior of a neural network.

**abhimanyu-pallavi-sudhir**on A way to beat superrational/EDT agents? · 2020-08-20T04:16:57.321Z · LW · GW

No, it doesn't. There is no 1/4 chance of anything once you've found yourself in Room A1.

You do acknowledge that the payout for the agent in room B (if it exists) from your actions is the same as the payout for you from your own actions, which if the coin came up tails is $3, yes?

**abhimanyu-pallavi-sudhir**on A way to beat superrational/EDT agents? · 2020-08-20T04:11:57.259Z · LW · GW

I don't understand what you are saying. If you find yourself in Room A1, you simply eliminate the last two possibilities so the total payout of Tails becomes 6.

If you find yourself in Room A1, you *do* find yourself in a world where you are allowed to bet. It doesn't make sense to consider the counterfactual, because you *already have gotten new information*.

**abhimanyu-pallavi-sudhir**on A way to beat superrational/EDT agents? · 2020-08-19T03:42:35.119Z · LW · GW

That's not important at all. The agents in rooms A1 and A2 *themselves* would do better to choose tails than to choose heads. They really are being harmed by the information.

**abhimanyu-pallavi-sudhir**on A way to beat superrational/EDT agents? · 2020-08-18T06:20:16.087Z · LW · GW

I see, that is indeed the same principle (and also simpler/we don't need to worry about whether we "control" symmetric situations).

**abhimanyu-pallavi-sudhir**on A way to beat superrational/EDT agents? · 2020-08-17T16:52:23.829Z · LW · GW

I don't think this is right. A superrational agent exploits the symmetry between A1 and A2, correct? So it must reason that an identical agent in A2 will reason the same way as it does, and if it bets heads, so will the other agent. That's the point of bringing up EDT.

**abhimanyu-pallavi-sudhir**on Utility functions without a maximum · 2020-08-12T18:03:59.102Z · LW · GW

Wait, but can't the AI also choose to adopt the strategy "build another computer with a larger largest computable number"?

**abhimanyu-pallavi-sudhir**on Utility functions without a maximum · 2020-08-12T17:58:20.896Z · LW · GW

Ah, that *is* elegant. Nice.

**abhimanyu-pallavi-sudhir**on Utility functions without a maximum · 2020-08-12T03:33:45.259Z · LW · GW

I don't understand the significance of using a TM -- is this any different from just applying some probability distribution over the set of actions?

**abhimanyu-pallavi-sudhir**on Utility functions without a maximum · 2020-08-11T17:18:04.173Z · LW · GW

Suppose the function U(t) is increasing fast enough, e.g. if the probability of reaching *t* is exp(-t), then let U(t) be exp(2t), or whatever.

I don't think the question can be dismissed that easily.

**abhimanyu-pallavi-sudhir**on Utility functions without a maximum · 2020-08-11T15:14:56.844Z · LW · GW

It does not require infinities. E.g. you can just reparameterize the problem to the interval (0, 1), see the edited question. You just require an infinite *set*.

**abhimanyu-pallavi-sudhir**on Utility functions without a maximum · 2020-08-11T15:04:49.092Z · LW · GW

Infinite *t* does not necessarily deliver infinite utility.

Perhaps it would be simpler if I instead let *t* be in (0, 1], and U(*t*) = {*t* if *t* < 1; 0 if *t* = 1}.

It's the same problem, with 1 replacing infinity. I have edited the question with this example instead.

(It's not a particularly weird utility function -- consider, e.g. if the agent needs to expend a resource such that the utility from expending the resource at time *t* is some fast-growing function *f*(*t*). But never expending the resource gives zero utility. In any case, an adverserial agent can always create this situation.)

**abhimanyu-pallavi-sudhir**on Godel in second-order logic? · 2020-07-27T03:13:37.122Z · LW · GW

I see. So the answer is that it is indeed true that Godel's statement is true in all models of second-order PA, but unprovable nonetheless since Godel's completeness theorem isn't true for second-order logic?

**abhimanyu-pallavi-sudhir**on Six economics misconceptions of mine which I've resolved over the last few years · 2020-07-19T04:50:41.373Z · LW · GW

This seems to be relevant to calculations of climate change externalities, where the research is almost always based on the direct costs of climate change if no one modified their behaviour, rather than the cost of building a sea wall, or planting trees.

**abhimanyu-pallavi-sudhir**on A Fable of Science and Politics · 2020-07-17T17:00:01.403Z · LW · GW

Disagree. Daria considers the colour of the sky an important issue because it is socially important, not because it is of actual cognitive importance. Ferris recognizes that it doesn't truly change much about his beliefs, since their society doesn't have any actual scientific theories predicting the colour of the sky (if they did, the alliances would not be on uncorrelated issues like taxes and marriage), and bothers with things he finds to be genuinely more important.

**abhimanyu-pallavi-sudhir**on The Blue-Minimizing Robot · 2020-07-04T13:06:42.365Z · LW · GW

One can absolutely construct a utility function for the robot. It's a "shooting-blue maximizer". Just because the appearing utility function is wrong doesn't mean there isn't a utility function.

**abhimanyu-pallavi-sudhir**on No Logical Positivist I · 2020-06-12T13:37:14.439Z · LW · GW

I'm not sure your interpretation of logical positivism is what the positivists actually say. They don't argue against having a mental model that is metaphysical, they point out that this mental model is simply a "gauge", and that anything physical is invariant under changes of this gauge.

**abhimanyu-pallavi-sudhir**on Political Roko's basilisk · 2020-01-19T09:26:44.292Z · LW · GW

Interesting. Did they promise to do so beforehand?

In any case, I'm not surprised the Soviets did something like this, but I guess the point is really "Why isn't this more widespread?" And also: "why does this not happen with goals other than staying in power?" E.g. why has no one tried to pass a bill that says "Roko condition AND we implement this-and-this policy". Because otherwise it seems that the stuff the Soviets did was motivated by something other than Roko's basilisk.

**abhimanyu-pallavi-sudhir**on Political Roko's basilisk · 2020-01-18T22:39:09.699Z · LW · GW

But that's not Roko's basilisk. Whether or not *you* individually vote for the candidate does not affect you as long as the candidate wins.

**abhimanyu-pallavi-sudhir**on Against improper priors · 2019-12-11T20:38:27.359Z · LW · GW

The "Dutch books" example is not restricted to improper priors. I don't have time to transform this into the language of your problem, but the basically similar two-envelopes problem can arise from the prior distribution:

f(x) = 1/4*(3/4)^n where x = 2^n (n >=0), 0 if x cannot be written in this form

Considering this as a prior on the amount of money in an envelope, the expectation of the envelope you didn't choose is always 8/7 of the envelope you did choose.

There is no actual mathematical contradiction with this sort of thing -- with prior or improper priors, thanks to the timely appearance of infinities. See here for an explanation:

https://thewindingnumber.blogspot.com/2019/12/two-envelopes-problem-beyond-bayes.html