All of lfghjkl's Comments + Replies

lfghjkl440

I have taken the survey.

edit: But let's leave them aside, and talk about me, since I am actually here. I am not in the same league as Ed Witten, not even close. Do you (generic sense) have something sensible to communicate to me about how I go about my business?

When did you become a theoretical physicist?

2IlyaShpitser
I am not. But I do theory work, and some of it is even related to analyzing data (and I am actually here to have this conversation, whereas Ed is not). So -- what do you have to teach me?
lfghjkl00

LOL. Word inflation strikes again with a force of a million atomic bombs! X-)

Knowing About Biases Can Hurt People has already been linked in this thread here. It seems to be the steelman of tailcalled's position and I suggest you argue against it instead of trying to score cheap points by pointing out how tailcalled uses "wrong" words to express himself.

3Lumifer
I am not much concerned about "wrong" words other than that it might generate misunderstanding and confusion, but it does seem to me that I and tailcalled have real (not definitional) differences and disagreements. I argue with live, present people. If you want to point out the many ways in which I'm wrong, jump in :-) But I am not going to argue with texts -- among other things, they don't answer back.
lfghjkl130

Looks like it has been addressed in Conjunction Controversy (Or, How They Nail It Down):

A further experiment is also discussed in Tversky and Kahneman (1983) in which 93 subjects rated the probability that Bjorn Borg, a strong tennis player, would in the Wimbledon finals "win the match", "lose the first set", "lose the first set but win the match", and "win the first set but lose the match". The conjunction fallacy was expressed: "lose the first set but win the match" was ranked more probable than"

... (read more)
lfghjkl10

If you equally lean towards two ideas, but like one more, that suggests you subconsciously find that less true.

And it could also mean that you just think the evidence for that proposition is better. Your argument looks more like post-hoc reasoning for a preferred conclusion rather than something that is empirically true.

Reversed stupidity is a different thing.

I'm sorry, but if you subconsciously like a false idea more often than chance then this quote still applies:

If you knew someone who was wrong 99.99% of the time on yes-or-no questions, you

... (read more)
lfghjkl00

In such dilemmas, I think the best thing is to figure out what is it your "corrupted hardware" wants to do and do the opposite - do the opposite what your instincts i.e. evolved biases suggest.

Reversed Stupidity Is Not Intelligence

5[anonymous]
Instinct != stupidity. This is a different thing here. Leaning towards an idea comes both from finding it true and liking it. If you equally lean towards two ideas, but like one more, that suggests you subconsciously find that less true. So if you go for the one you dislike, you probably go for an idea you find subconsciously more true.Leaning towards an idea you dislike suggests you found so much truth in it, subconsciously, that it even overcame the ugh-field that came from disliking it. And that is a remarkably lot of truth. Reversed stupidity is a different thing. That is a lot like "Since there is no such thing as Adam and Eve's original sin, human nature cannot have any factory bugs and must be infinitely perfectible." (Age of Enlightenment philosophy.) That is reversed stupidity. It is a different thing. It is reversed affect.
lfghjkl130

Thus, using "Mort!" as an expletive contributes, in a very slight way, to my achieving NotDying.

I disagree. Using "mort" as a swear word would be extremely low status. You'd only come across as the angry weird guy who doesn't like death. Associating "being against death" with "being socially oblivious" will not further your goal, please don't do this.

-3DataPacRat
I don't think you have to worry as much as your post seems to indicate you do. As best as I can recall, in the last decade or so, I have sworn aloud approximately once - and I was alone when I did that. (IIRC, it was when I thought I'd discovered my VPN had started blocking access to certain political sites.)
lfghjkl10

He can't because the curse or unbreakable vow he took to not harm himself didn't have release conditions. There was no purpose in putting them in. You don't set up "I can't kill myself unless I try to kill myself", because the 2nd part is useless if the first part works.

Without the second part any clone of Voldemort exploiting a bug in magic to negate the first would have a huge advantage over all the others. Given the whimsical nature of magic in this story such a bug is highly likely to exist. Voldemort is smart enough to both realize that a... (read more)

0[anonymous]
There was a sequence on decision theory and value of information, which I sadly read but not internalized. Can someone who did please calculate what it's worth for Voldemort (and Dumbledore) to keep ambiguity unresolved as a preventive measure?
lfghjkl30

but Riddle's adult memories are also stashed away for later use and the latter are the "dark side".

I agree with everything you said except that. Look at this line from chapter 17 after Harry picked up Neville's remembrall:

The Remembrall was glowing bright red in his hand, blazing like a miniature sun that cast shadows on the ground in broad daylight.

It makes it pretty clear that the second spell Voldemort cast on baby-Harry was Obliviate. Since we know that obliviated memories can not be recovered only Riddle's thought-patterns are left in Harry, and that's his dark side.

0Izeinwinter
Not necessarily - infants brains are to plastic to retain memory, so it's entirely possible it just erased itself all on it's own. Uhm. I've been entertaining the idea that Slytherin did something to his descendants to make them immune to memory magics. In which case, maybe the entire point of horcruxing an infant was to get a fork of his mindstate without his memories, because the direct approach would not cut it. On the other hand, this chain of inferences is getting a wee bit longer than I am at all comfortable with.
0gjm
Yes, that's very plausible.
lfghjkl50

It's not, and that is why QALY is a too simplistic point of view.

lfghjkl70

Choosing to not create a new person is not the same as killing an existing one.

-1alienist
How is this different from a QALY point of view?
0Gunnar_Zarncke
I agree but in isolation in such an population ethics context it has insufficient elaboration. Some might disagree at least in theory.
lfghjkl30

The problem is that no matter your intentions the phrase reads as a complete dismissal of Viliam_Bur's argument. That is how these discussions turn ugly.

lfghjkl30

Yeah, I'd say motivated thinking.

Comments like these are not helpful. Especially not on a highly politicized topic such as the one the two of you are discussing.

4NancyLebovitz
I don't know if it's enough to matter, but I only mentioned motivated thinking because Villiam brought up the possibility.
lfghjkl80

Wow, you're right. Someone should probably fix that.

At least deleting your account will make it very hard to track down any of your old posts unless they already know which comments to look for, so if they aren't already aware of LW you'd probably be safe.

lfghjkl00

The easiest solution is to just delete your current account and start a new one. None of your meatspace friends could then know which posts from [deleted] was from you or even that any of them came from you in the first place (unless they are an LW admin, but then I don't think you should be worried about them knowing you post here).

This solution also has the benefit of not removing valuable comments in old threads (which looking at your karma I assume there are many of).

3A1987dM
You can still tell who wrote such comments by following the permalink and looking at the title of the page.
lfghjkl00

Maybe he uses good as a synonym for friendly?

lfghjkl60

For those who aren't aware, Fate/stay night (the visual novel) has been mentioned/recommended here before in Eliezer's Three Worlds Collide short story:

I suspect the aliens will consider this one of their great historical works of literature, like Hamlet or Fate/stay night -

Reading the visual novel can take some time, so anyone who isn't interested in that should really consider watching this TV adaption instead. Personally, I found Unlimited Blade Works to be the best part of Fate/stay night (closely followed by Heaven's Feel, which they've also promi... (read more)

2Ritalin
You know, it may well actually make it to 'acclaimed univesal classic' status. It's tremendously good stuff.
lfghjkl30

Taking a quote from somewhere else as a reply always risks the possibility that it doesn't quite fit what it is being used as a reply to.

The quote might not fit perfectly, but the insight does.

I was pointing out that the described competence level implies that a competent programmer must be in the top 0.5% of the candidates for the job, not the top 0.5% of all programmers in the world.

And the point of the quote is that this really doesn't say as much as you think. Hence why "99.5% of candidates fail the FizzBuzz test" isn't as implausible as on first glance.

lfghjkl40

What you're missing is the following insight:

Let's simplify for the moment and assume that all software developers in the world could be ranked in absolute order of skill, and that you had a magical screening process that found the "best" person from any field.

Now, when you get those 200 resumes, and hire the best person from the top 200, does that mean you're hiring the top 0.5%?

"Maybe."

No. You're not. Think about what happens to the other 199 that you didn't hire.

They go look for another job.

That means, in this horribly simplified u

... (read more)
3Jiro
Taking a quote from somewhere else as a reply always risks the possibility that it doesn't quite fit what it is being used as a reply to. I was pointing out that the described competence level implies that a competent programmer must be in the top 0.5% of the candidates for the job, not the top 0.5% of all programmers in the world. Of course your quote is in reference to the latter, not the former, and is therefore off point. In fact, your quote says that the former is indeed true, but the latter should not be confused with it. (Furthermore, the original FizzBuzz reference claims that only 1 out of 200 people can solve FizzBuzz as an interview question, not as something required with each resume. Only hiring 1 out of 200 candidates who submit resumes is a heck of a lot more plausible than only hiring 1 out of 200 candidates who get to the interview stage.)
lfghjkl60

Very relevant article from the sequences: Detached Lever Fallacy.

Not saying you're committing this fallacy, but it does explain some of the bigger problems with "raising an AI like a child" that you might not have thought of.

-1TheAncientGeek
Hardly dispositive. A utility function that says "learn and care what your parents care about" looks relatively simple on paper. And we know the minumum intelligence required is that of a human toddler,
4Paul Crowley
I completely made this mistake right up until the point I read that article.
lfghjkl70

I've also been thinking along these lines, anyone remember this part from the opening ceremony?

The young, thin, nervous man who Harry had first met in the Leaky Cauldron slowly made his way up to the podium, glancing fearfully around in all directions. Harry caught a glimpse of the back of his head, and it looked like Professor Quirrell might already be going bald, despite his seeming youth.

"Wonder what's wrong with him," whispered the older-looking student sitting next to Harry. Similar hushed comments were being exchanged elsewhere along the

... (read more)
8gwern
Yes, that often came up in past discussions. The problem is that the dual persona part seemed to get dropped early on and it changed to one of energy - Quirrel going into zombie-mode, not shy-Quirinius-mode. Presumably when he was up there on the podium, he was trying to summon up the energy for his speech.
lfghjkl130

Good point. To build on that here's something I thought of when trying (but most likely not succeeding) to model/steelman Eliezer's thoughts at the time of his decision:

This basilisk is clearly bullshit, but there's a small (and maybe not vanishingly small) chance that with enough discussion people can come up with a sequence of "improved" basilisks that suffer from less and less obvious flaws until we end up with one worth taking seriously. It's probably better to just nip this one in the bud. Also, creating and debunking all these basilisks w

... (read more)

I would not call it a success. Sufficiently small silver linings are not worth focusing on with large-enough clouds.

lfghjkl60

Going from 2 things to 1 gives 100% more attention to the remaining single.

The effect will be much higher than that:

Because the brain cannot fully focus when multitasking, people take longer to complete tasks and are predisposed to error. When people attempt to complete many tasks at one time, “or [alternate] rapidly between them, errors go way up and it takes far longer—often double the time or more—to get the jobs done than if they were done sequentially,” states Meyer.[9] This is largely because “the brain is compelled to restart and refocus”.[10]

... (read more)
lfghjkl00

When we forget about these things, we end up with billions being spent in incredibly complicated experiments on supposedly 'foundational' particle physics at the LHC - raising existential risks, such as the possibility of creating a black hole, or a 'strangelet'.

This is a common misconception, from Safety of high-energy particle collision experiments on wikipedia:

Claims escalated as commissioning of the LHC drew closer, around 2008–2010. The claimed dangers included the production of stable micro black holes and the creation of hypothetical particles

... (read more)
lfghjkl30

And Einstein famously regretted his career as a physicist upon learning of these fateful possibilities, stating that if he had known earlier, he would have chosen to be a watchmaker.

This is a common misattribution:

http://en.wikiquote.org/wiki/Albert_Einstein#Misattributed

Scroll down to "If only I had known, I should have become a watch-maker."

lfghjkl140

Hofstadter's Law: It always takes longer than you expect, even when you take into account Hofstadter's Law.

5DefectiveAlgorithm
After reading this, I became incapable of giving finite time estimates for anything. :/
Slackson110

This doesn't always apply. It can, for example, leave you with an hour to kill at a train station, because you decided it would be really embarrassing to show up late for your ride to a CFAR workshop because of the planning fallacy.

3[anonymous]
Nobody gets my jokes...
lfghjkl10

Sorry, misread your comment and thought you referred to the law of excluded middle. The problem with reading while I should be sleeping.

lfghjkl00

Unless you're dealing with Intuitionistic logic:

Semantically, intuitionistic logic is a restriction of classical logic in which the law of excluded middle and double negation elimination are not admitted as axioms.

[This comment is no longer endorsed by its author]Reply
1Richard_Kennaway
In intuitionistic logic, it is still the case that nothing can be both true and false.
lfghjkl60

Not if you consider it the "least crazy" alternative, and with only two parties in your country there doesn't seem to be much choice.

lfghjkl00

Hmm, just read that story before checking your spoiler and it was interesting, even despite the author's poor grasp of the physics he tried to explain. A light ray going from point A to point B is not taking the shortest path (measured in time) because it wants to reach B, the point B is merely a point on the geodesic curve the light ray is currently travelling along.

In other words, these light rays are taking the least time to reach the points they pass without intending to reach them, the points are just in the way.

That said, thanks for the recommendati... (read more)

0Ishaan
agree with your rot13. I guess it mostly just seemed related enough to be worth mentioning. A bunch of inferences which arise from the following: statement: "The supposition that an idealized rational agent's mind interacts with the universe in any way other than via the actions it chooses to carry out contains logical paradoxes." I'm not confident in the opinion, it just represents my current state of understanding. When I've fleshed it out better in my head I will write it up and display it for criticism, unless I realize it is wrong during the intervening time (which is quite likely). One potential consequence is that TDT might ultimately be impossible to fully formalize without paradox via self-reference. The conclusion is that CDT is correct, as long as you follow the no-mind-reading rule. I reconstruct Newcombs and similar problems in such a way that the problem is similar but we aren't reading the agent's mind, and seem to always arrive at winning answers.
lfghjkl90

It is clear that the ending would have been very different had the author heard about TDT.

-2Ishaan
Check out "Story of your life" by the same author. Ur'f znqr nyvraf jub jbhyq cebonoyl bcrengr ol GQG, zl cuvybfbcuvpny dhvooyrf jvgu GQG abgjvgufgnaqvat.
lfghjkl40

That would require him to stay up all night, since he cannot know in advance the exact time Flitwick will arrive. It is much more likely that the Harry we saw was the first one, and that he's now going to go back in time to pick up the body.

lfghjkl110

"I very much need to visit the washroom, and I would also like to change out of these pyjamas."

This is where he's going to be using the time-turner to pick up Hermione's transfigured body before Flitwick arrives.

The reason this works this time, is that he has already precommitted to doing so when he spent all those hours thinking until dinner the day before. The ring is a red herring.

2Caspian
My first thought was that she'd been transfigured into the pajamas, but I don't think that's likely. My theory is that when Harry slept in his bed it was the second time he'd been through that time period. The first time, he stayed invisible with transfigured Hermione in his possession, waited until woken-up Harry had finished being searched, gave her to woken-up Harry, then went back in time and went to bed.
3cousin_it
Wait, can you use a time-turner to go back, pick up something and return to the present? In that case you can keep something permanently hidden outside of time, except for a minute every 6 hours as you pick it up and drop it off.
lfghjkl00

Well, that would depend entirely on whether or not time travel beyond 6 hours into the past is possible. So, in other words, it's time travel arbitrarily far back in time that would make this term nonsensical.

lfghjkl20

By definition, however, an information-theoretic death means that such an error-correction scheme would be impossible; such a machine would require knowledge that, by the Uncertainty Principle, cannot be attained.

Ok, now we're just talking past each other. Just googled the term "information-theoretic death" and got the following definition from wikipedia:

Information-theoretic death is the destruction of the information within a human brain (or any cognitive structure capable of constituting a person) to such an extent that recovery of the or

... (read more)
1linkhyrule5
Information-theoretic death implies the absence of time travel. With time travel, the concept is nonsensical.
lfghjkl00

This problem is fundamentally equivalent to time travel

I agree that if you solve time travel you can also solve death, but the other implication does not hold. A possible way for Harry to "resurrect" Hermione is to scan her brain, run it through an error-correcting algorithm (to reduce/remove errors introduced from decay and it being transfigured) and then "print out" a brain that is arbitrarily similar to Hermione's brain at the moment of her death. This will of course depend on the amount of computing power available to Harry, but ... (read more)

0linkhyrule5
By definition, however, an information-theoretic death means that such an error-correction scheme would be impossible; such a machine would require knowledge that, by the Uncertainty Principle, cannot be attained. Thus, if you did have that capability regardless, it could then be used to rewind an arbitrary section of the universe to an arbitrary time, which is equivalent to time travel.
lfghjkl30

Though any trick that can overcome information-theoretic death has a decent chance of allowing arbitrary time travel anyway.

I do not see how that would follow at all, could you please explain?

The latter, however, is easily dealt with: show up under the Invisibility Cloak, hit his past self with some variant of the Confundus Charm.

Dumbledore has already told Harry that he tried a variant of this once and that it didn't work. "Time" didn't like that. See this quote from chapter 90:

I asked the Headmaster to go back and save Hermione and the

... (read more)
2linkhyrule5
Reversing information-theoretic death is fundamentally the problem of taking a bunch of atoms in random configurations and getting a person out of it - and not just any person, a particular person about whom you no longer have any data whatsoever. This problem is fundamentally equivalent to time travel: if you can time travel, you can just go back and copy the original, and if you can reverse information-theoretic death, you can "resurrect" the visible universe at whatever time and put yourself in, essentially, a simulation of a prior time. Actually, there's a stronger example from the Standford Prison Experiment arc, which is why I already retracted this point. (Though why it doesn't work is still a legitimate and interesting question.)
lfghjkl70

I highly doubt he would do that as well, given that there is no known method to travel further than 6 hours back in time. He would not base his entire "save Hermione" plan on a hope that he could somehow find a way around this constraint.

What he does at this very moment should exclude as few plans to save her as possible, and not preserving her brain would exclude almost all of them.

Alternatively, he could have simply entered the room and watched the room for six hours, perhaps while random-walking. By doing so, he ensures that the only observ

... (read more)
0linkhyrule5
The former is granted; better to be sure. (Though any trick that can overcome information-theoretic death has a decent chance of allowing arbitrary time travel anyway.) The latter, however, is easily dealt with: show up under the Invisibility Cloak, hit his past self with some variant of the Confundus Charm. Since he's watched the entire 6 hours, he can be certain this will be sufficient. ... except he can't, because someone else could've pulled the same trick. Nevermind; retracted.
lfghjkl40

This was a bad idea in canon and will be an even worse idea here where obliviations are permanent.

2linkhyrule5
Actually, they were pseudo-permanent in canon too. It seems like the caster of a Memory Charm can revoke it, but nobody else.
lfghjkl10

I highly doubt that he would mess around with her body more than necessary. He knows that he doesn't yet have the knowledge or power to resurrect her, and any experimenting will have to be done when there isn't a limited time-frame to stop her body from deteriorating further.

My current best guess as to what happened in that room is that Harry spent a good deal of time transfiguring her body into an element so stable, that the atoms won't move around "too much" in the days/weeks/months/years he would need before being able to resurrect her. He the... (read more)

0linkhyrule5
Alternatively, he could have simply entered the room and watched the room for six hours, perhaps while random-walking. By doing so, he ensures that the only observer he needs to worry about himself, so that far-future Harry can plan a time travel trip in security.
lfghjkl320

He needs 6 hours of uninterrupted time with Hermione's body. His present self guards the door while his future self does whatever he plans on doing to prepare her body for long term preservation.

See this quote from chapter 91 set right after Harry exits the room where her body is stored:

When the door opened again, Harry seemed to have changed, as though that minute and a half had passed over the course of lifetimes.

That "lifetime" is more specifically 6 hours.

0Intrism
"Lifetimes" could also be literal (though this is a bit dubious considering that it's from McGonagall's POV) - perhaps Harry managed to reanimate Hermione for multiple brief periods? Or, perhaps Harry experimented with animating, killing, or reanimating other, smaller creatures?
lfghjkl50

No I was pointing out that in all realistic ways of constructing the hypothetical there are going to be quite major risks and costs to oneself in pushing the fat man

I'm guessing wedrifid isn't taking that into account because we were explicitly asked not to do that here:

Try not to Kobayashi Maru this question, at least not yet. I know you can criticize the scenario and find it unrealistic.

3drnickbone
OK, my bad. Thanks for the patient reminder to read the entire original post before jumping into commenting on the comments. I did in fact miss all the caveats about wheelchairs, light rolling, fat man being anaesthetised etc. Doh! I guess elharo should also have stipulated that no-one has any avenging friends or relatives (or lawyers) in the entire scenario, and that the usual authorities are going to give a free-pass to any law-breaking today. Maybe also that I'll forget the whole thing in the morning, so there will be no residual guilt, angst etc. To be honest, making the wheelchair roll gently into the path of the trolley is now looking very analogous to switching a trolley between two tracks: both seem mechanical and impersonal, with little to tell them apart. I find that I have no strong intuitions any more: my remaining moral intuitions are extremely confused. The scenario is so contrived that I'm feeling no sympathy for anyone, and no real Kantian imperatives either. I might as well be asked whether I want to kill a Martian to save five Venusians. Weird.
lfghjkl20

Ok, I might have formulated myself badly. My argument is that any agent of bounded computational power is forced to use two utility functions. The one they wish they had (i.e. the unbounded linear version) and the one they are forced to use in their calculations because of their limitations (i.e. an asymptotically bounded approximation).

For those agents capable of self-modification, just add a clause to increase their computational power (and thereby increasing the bound of their approximation) whenever the utilities of the "scales they're working on... (read more)

lfghjkl80

Since a human mind really can't naturally conceive of the difference between huge numbers like these, wouldn't it follow that our utility functions are bounded by an horizontal asymptote? And shouldn't that solve this problem?

I mean, if the amount of utility gained from saving x amount of people is no longer allowed to increase boundlessly, you don't need such improbable leverage penalties. You'd still of course have the property that it's better to save more people, just not linearly better.

I find that unsatisfactory for the following reasons - first, I am a great believer in life and love without bound; second, I suspect that the number of people in the multiverse is already great enough to max out that sort of asymptote and yet I still care; third, if this number is not already maxed out, I find it counterintuitive that someone another universe over could cause me to experience preference reversals in this universe by manipulating the number of people who already exist inside a box.

lfghjkl00

It is certainly true that if we know A implies B, then knowledge of B will also confer knowledge of A. However, this is not enough to call it a logical implication, and given that the original saying used the terms modus ponens and modus tollens, a logical implication is obviously what is meant in this setting.

lfghjkl00

Well, that saying only makes sense if it has the exact same implication in both terms (and then their respective conclusions has to be about different propositions), otherwise one is just claiming the equivalent of:

"One guy thinks A implies B, another thinks B implies A."

And that is not a very good saying. It just sounds like something a post-modernist would say.

2jsteinhardt
If you make A -> B only with some probability, then B becomes probabilistically dependent on A as well; i.e. if you make logic probabilistic then this actually becomes true in a sense.
4Kindly
"One man's modus ponens is another man's modus ponens... in the other direction."
lfghjkl30

It's a perfectly reasonable conclusion.

While this may be true, it does not follow from your saying. Chaosmage is concluding p (google is more trustworthy), while CellBioGuy is concluding not-p (google is less trustworthy). If you look at the actual definitions of modus ponens and modus tollens you'll find the following:

Modus ponens: A -> B and A, therefore B

Modus tollens: A -> B and not-B, therefore not-A

In other words, CellBioGuy would've had to conclude the negation of chaosmage's premise (and not his conclusion) for your saying to be relevant in this situation.

5Kindly
There's a double implication involved: "Google is trustworthy if and only if transhumanism is worth taking seriously." (Or at least the probabilistic version of that.) So there's four possible Modus Whatevers to use, and I think altogether we've covered three of them. The remaining possibility is "Well, I took transhumanism seriously before, but if Google supports it, then it must be nonsense."
0[anonymous]
To clarify, here's what's going on. The link between Google and transhumanism sets up the implication "If Google is trustworthy, then transhumanism should be taken seriously." Modus ponens: Google is trustworthy, therefore transhumanism should be taken seriously. Modus tollens: Transhumanism should not be taken seriously, therefore Google is untrustworthy.
lfghjkl00

This is what we'd expect to see if people who reply early were overwhelmingly more likely to give the first answer. It's also what we would see if someone did not like the way the poll was going and decided to rig it.

There is also the third alternative of a great comment defending option two showing up (or having been up-voted enough) at the time you mentioned, to sway "public opinion" in its direction. It seems highly likely that people would read the most visible comments (and be persuaded by them) before voting.

Now, I don't know which comme... (read more)

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