All of Gvaerg's Comments + Replies

0mako yass
I agree he has the aesthetic of a rationalist- probabilism rather than dialethism, due respect for existential risks- but I doubt anyone who raves about GMO crops posing an existential risk to the species could be a rationalist. http://bigthink.com/risk-reason-and-reality/taleb-on-gmos-advocacy-masquerading-poorly-as-honest-intellectual-argument (this article makes a lot of invalid attacks, but it provides an overview) Afraid to step forward because of an unimaginably distant, abstract threat of ruin, while ignoring the far less distant potential for a sprint for GMO tech to mitigate other extinction risks by making it easier to produce food with limited resources (for example, the limited remaining highlands after sea level rise, temperature increase, land abuses, or from underground bunkers running on limited energy sources with limited populations).
0[anonymous]
Downvoted for not having any explanation. Also, Taleb donates to MIRI. Edit: Can't find evidence of Taleb donating to MIRI/CFAR.

Is there any Egan or Vinge fanfic except EY's crossover Finale of the...?

8Nornagest
Don't know about Egan or Vinge specifically, but fanfic of literary SF not targeted at the YA market is very rare. I'd speculate this is partly due to demographics and partly due to the fact that a lot of trad SF's appeal lies in conceptual stuff that's generally more or less fully explored in its work of origin.

Thanks! I've seen many times the statement that ontology is strictly included in metaphysics, but this is the first time I've seen an example of something that's in the set-theoretic difference.

Did the survey! I think i gave highly contradictory answers.

I think the anagram-of-your-name thing works better if you're called Scott Alexander than if you're called Viliam Bur.

Or Hyaena Hell Infusion.

Nice to see an old face again!

This should be fun!

Distress - it's like the kitchen sink of hard/near-future SF

Quarantine - very enjoyable, but a bit simple-minded

Incandescence - seems like a return to early Egan's minimalism

Permutation City - cool, but rather off for me

Schild's Ladder - doesn't feel innovative, the ending has the same vibe as that of Permutation

Zendegi - was expecting more LW mockery after the discussions, unfortunately it was very limited

Diaspora - although brilliant in some respects, very confusingly written

Teranesia - just boring, I understand why it's not so known

Haven't read yet An Unusual Angle; the Orthogonal trilogy I'll read when I get it whole.

"After all this time?"

"Always."

3cousin_it
I just made a quick generator for phrases like this :-)

A nearby store has this sign that kinda reminds me of What the Tortoise Said to Achilles:

Products marked with can be heated at your request!

Definitely not making this up. Showed this today to my girlfriend who was speechless upon exiting the store.

3cousin_it
Nerdier: Nerdiest: Even after all these years, writing quines still feels like I'm cheating the universe.
[anonymous]140

You should recurse one level deeper and put a sign outside the store saying "Products marked purchased in stores marked with can be heated at your request!"> can be heated at your request!"

  1. This happened when I was 12 years old. I was trying to solve a problem at a mathematical contest which involved proving some identity with the nth powers of 5 and 7. I recall thinking vaguely "if you go to n+1 what is added in the left hand side is also in the right hand side" and so I discovered mathematical induction. In ten minutes I had a rigorous proof. Though, I didn't find it so convincing, so I ended with an unsure-of-myself comment "Hence, it is also valid for 3, 4, 5, 6 and so on..."

  2. When I was in high school, creationism se

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Okay, fixed. IMHO it would make more sense to rot13 hereditarily.

1Velorien
Sometimes, certainly. I'm not sure it would work well as a general policy. People may rot13 things incorrectly, or may rot13 a post only some of which constitutes a spoiler. If that gets passed along to all further comments, it'll cut everyone who avoids spoilers out of the discussion. Your comment, for example, is interesting, and led me to look up Bane's Rule of Two, but I would not have done so if I hadn't suspected that yours was an incorrect rot13 to begin with.
1Velorien
Kindly refrain from using rot13 for comments that do not fit the rule given in Will's comment above. The rule is there for a reason, and you are reducing its reliability as a tool for avoiding spoilers.

Does anyone know why Stephen Bond's website is down? It's been so for something like a month.

Wildbow at least explicitly puts forth metaphysics to partially explain the narrative causality.

And that was the final piece of the puzzle in getting me to read Worm. Off I go!

Marker is the closest to the state of the art. Hodges is a bit verbose and for beginners. Poizat is a little idiosyncratic (just look at the Introduction!).

I am also interested in the basis of MIRI's recommendation. Perhaps they are not too connected to actual mathematicians studying it, as model theory is pretty much a fringe topic.

2gjm
Here is the last paragraph, which you can read via Google Books: The first paragraph of the preface to the English translation (which I found via Amazon's "look inside" feature) says this: which sounds extremely weird until it transpires that he means it was written in French. (It appears that the book was less well received than the author hoped, at least partly on account of its having been written in French, and he is still cross about it, which I think is why he expresses himself in such a peculiar way: he's both parodying and criticizing the idea that there's something obscure about French.) So, yeah, "idiosyncratic" is right. As for the mathematical approach, here's another quotation from the Introduction: (Gosh!)
0Nebu
Why not link to the books or give their ISBNs or something? There are at least two books on model theory by Hodges: ISBN:9780521587136 and ISBN:9780511551574

I don't deny that, I just say that maybe the specific environment doesn't suit everyone.

Well, some rationalists aren't so capitalism-oriented.

0jefftk
You can do a lot of good with money.

Thanks! Given that that site lists Egan (and other works that I knew about) and it strives to be complete, it seems it's what I had been looking for.

What examples can you give of books that contain discussions of advanced (graduate or research-level) mathematics, similar to what Greg Egan does in his novels (I suppose the majority of such books are hard sci-fi, though I'm not betting on it)? I'm trying to find out what has already been done in the area.

3bsm
There's this in mathematics. Also, this website might be a good place to look, though most of its examples seem less advanced than what you are looking for.

This topic is for recommending media, not for random criticism...

I'd rather have some sort of discussion than just people posting the names of things.

I would like to see a review after someone goes through this process.

6Dorikka
You may be interested in this.

I'm taking them up on their offer right now. I'll report back when I'm done. EDIT: here.

You can see it now in action: the RSS feed is two articles behind the blog. (I waited for the problem to show up.)

EDIT (2013-12-28): The RSS feed has updated.

I've noticed something: the MIRI blog RSS feed doesn't update as a new article appears on the blog, but rather at certain times (two or three times a month?) it updates with the articles that have been published since the last update.

Does anyone know why this happens?

4alexvermeer
Hmm, not sure why that's happening. I'll look into it.

A related question: I clicked the (modified) URL that "admin" sent me, and the page contained a form where I could fill in my LW password in order to create a wiki account. I submitted it but I cannot login on the wiki with my LW credentials. What's going on?

And simulation theory is kinda the opposite of statistics - whereas in statistics you deduce the distribution from sample data, in simulation you compute plausible sample data from a given distribution.

I did some Googling after reading the article and found this book by Dijkstra and Scholten actually showing how a first-order language could be adapted to yield easy and teachable corectness proofs. That is actually amazing! I have a degree in CS and unfortunately I've never seen a formal specification system that could actually be implemented and not be just some almost-tautological mathematical logic, like so many systems that exist in the academia. Thanks very much for the link.

4Pfft
If you are interested in this kind of thing, you should check out Dafny. It's a programming language with Hoare-logic style pre- and postconditions (and the underlying implementation computes weakest preconditions, Dijkstra-style). But what sets it apart is that it is backed by an automatic theorem prover (Z3) which is sufficiently powerful to handle most things that seem trivial to a human. To me Dafny feels like the promise of programming verification research in the 1970s finally came through: you can carry out program verification like you would with pen and paper, without being overwhelmed by finicky algebraic manipulations.

Well, God only claimed he would never destroy people with water again... everything else was fair game.

1Ritalin
Well that makes him quite the bloody liar, then, doesn't it? What with all them Tsunamis and Typhoons and Hurricanes and plain big old Floods that've taken place since then, to this very day.

It's more of an impression of mine than an actual statement of theirs.

From what I've seen in the last year, MIRI has sort-of backpedaled on the "actually building an AGI/FAI" goal, and pushed forward in their public declarations the "milder" goal of ensuring a positive impact of AGI when it finally gets created by someone.

5passive_fist
This seems consistent with the first sentence in their mission statement:
2Adele_L
Are you sure? The linked comment was posted in August of this year. I have seen them push the second goal more strongly recently, but I don't think the first goal has been rescinded.

There is also a TV adaptation from 1999), where the chronology is a bit mixed-up because it presents the destruction of Sodom and Gomorrah as some sort of "prelude" to the Flood, whereas in the Bible the Sodom story is several hundred years after Noah. The reason why I'm bringing this up is that in that film, the destruction of Sodom is presented with fireballs/meteorites, which also feature in this linked trailer, so I'm lead to think this film will also distill the two stories together in some way (there is no fire-related destruction in the Bi... (read more)

1Ritalin
Hopkins probably plays Methuselah. And I had always thought the Sodom story was antediluvian... How many times must the LORD cleans the world He so incompetently made? Clearly He has very sucky people-modeling skills.

I tried to find a good book on the mathematics (not the philosophy!) of second-order logic on my usual sources (like mathoverflow.net discussions), but so far they have rendered nothing. Given that, as I understand it, there is some interest on these forums in SOL, can anyone help me with a recommendation? Thanks.

1wuncidunci
van Dalen's Logic and Structure has a chapter on second order logic, but it's only 10 pages long. Shapiro's Foundations without Foundationalism has as its main purpose to argue in favour of SOL, I've only read the first two chapters which give philosophical arguments for SOL, which were quite good, but a bit too chatty for my tastes. Chapters 3 to 5 is where the actual logic lives, and I can't say much about them.

Took the survey. Can't wait for the results.

From what I know, Chang & Keisler is a bit dated and can create a wrong perspective on what model theorists are researching nowadays. Maybe you should also look at a modern textbook, like the ones from Hodges, Marker or Poizat.

0Yaakov T
Which of the 3 would you recommend? Does someone know why MIRI recommends Chang and Keisler if it is somewhat outdated?

This thing can happen even in mathematics or theoretical CS, where there can be a gradual growth of a group of people researching something which gets ignored by and/or has no relevance to the mainstream community.

A good example is institutional model theory, whose practicioners think it is the ultimate theory of abstract logic, even though its accomplishments remain to be seen.

Well, sort of - the protagonist is a child who tries to decipher a clue for a treasure hunt and so he realizes that a model that can predict anything is useless.

A year ago, I was going to the local Institute of Mathematics (I live in Bucharest) to attend a short talk on mathematical logic. The talk was scheduled at noon. Given that I had spent the night before at my girlfriend's and we were going somewhere together in the afternoon, I took her with me. While walking towards the Institute, I said to her that I don't remember the name of the speaker. She said that maybe it's a guy that we had met at a conference two months before (that conference was on a completely different area of math, namely algebraic combinato... (read more)

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2stripey7
Possibly you'd previously mentioned his name to her before forgetting it. Or she'd seen the name somewhere. Or she'd seen him on the street.

"I spread the map out on the dining room table, and I held down the corners with cans of V8. The dots from where I'd found things looked like the stars in the universe. I connected them, like an astrologer, and if you squinted your eyes like a Chinese person, it kind of looked like the word 'fragile'. [...] I erased and connected the dots to make 'porte'. I had the revelation that I could connect the dots to make 'cyborg', and 'platypus', and 'boobs', and even 'Oskar', if you were extremely Chinese. I could connect them to make almost anything I want

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3NancyLebovitz
The "23 Enigma" is the Discordian belief that all events are connected to the number 23, given enough ingenuity on the part of the interpreter.
3MalcolmOcean
Apophenia.

What's the current progress on this?