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> There's even syntax arguments in mathematics! What's the derivative of a function f? is it f'(x) or df/dx ? Is multiplication represented by a dot (.) or a cross (x) or by a juxtaposition of expressions?

Those aren't arguments. All of those are very standard things to do.

There's a Spiked Math comic with some good mathematics-engineering trash talk, though, with the mathematicians shooing away a hapless engineer with comments like "do you even know how to spell 'imaginary'?" and "why don't you go jmagine you have friends?" Again, I wouldn't describe this as an area of active debate.
I think reading this story some people might think, well, who cares, this guy is guilty. And in this particular case, the actual guy on trial does happen to be very guilty in deed. He did confess, and I think they had a pretty strong case against him without the jail house snitch.

BUT, I would like to point out that this is still a very important case because a) this is illegal, and b) because jail house snitches are extremely unreliable. That's putting it mildly. In reality, ALL jail house snitches are liars and they will literally tell the police anything that the police want's to here. Have you ever wondered why a good lawyer will NEVER give a copy of the clients file to a client, if that client is in jail. If you do that, there is a very high likelihood that someone in jail will sneak a peak in that file, find out what kind of evidence the cops have, and will immediately claim that they have independent knowledge of that evidence, because the client confessed to it.

Cops promoting jailhouse snitching can lead to higher conviction rates, but not better justice. In fact really good investigators, you know, the once who actually want to find out the truth, not just convict people, will slip some false leading questions during their interview to see if they can catch their "star witness" on a lie, or so I have been told by an investigator who used to be detective for many decades before retiring and becoming a PI.
Did you notice the "or"? Just delete it if you feel that way.
This is horrific. Eventually the product will become so bad that, at the margin, foreign tourists will cease to be interested in it and take their (NZ) dollars elsewhere.

Though I've had a nasty experience at Canadian immigration. Once I was invited to speak at a University of Ottawa law school event but neglected to bring the invitation letter. I was directed to secondary screening and spent what seemed like hours there before being allowed to enter the country. At one point a Canadian immigration official said they couldn't find any record of the conference, but as far as I could tell they were looking at the main school's web site, not the law school's. Sigh. Ironically the event was sponsored by the Canadian federal government...

At least it wasn't 33 hours of hell.
It's on the state to establish that it was evidence. In this case, they did some computer forensics.
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So I spent about 60 seconds doing research. The J-1 visa they initially applied for is a work visa (or study visa). The ETSA they came on is for visa-waiver (tourism.) Most countries are going to be very unhappy if you apply for a work visa, don't get it, then show up anyway and say you're just a tourist. Non unreasonably, they assume you're lying. This isn't just a US thing.
New Zealand!

As RowanH suggested above. Have a look at www.seek.co.nz
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So what? I might delete it just for my own convenience. (BTW, it's irrelevant if somebody does so, but if you are curious: I actually do. The reason is it is much simpler to search for something in the cache/history when it's small.) There's no reason whatsoever to think that I'm hiding something. I mean, if I was an investigator, I surely would pay attention to that, but I cannot (or shouldn't be able to) treat absence of evidence as evidence of "hiding something". No evidence is no evidence and nothing more.
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On one hand, this account sounds overly dramatized (and quite rude calling the officers "broom pushers"), and it's hard to feel sympathy for people who take the privilege of international travel too lightly by not researching the relevant visa regulations (especially when it's a journalist of all people).

On the other hand, US immigration and customs officials really do seem heavy-handed, and seem to revel in treating every tourist who filled out a form incorrectly or misunderstood some rules as the next Bin Laden.

Now it's just a TV show so I don't know how "cleaned-up" it is, but if you watch "Australia Border Patrol" they seem to have a much better relationship with their visitors. Many episodes have people arrive flouting quarantine rules or misrepresenting themselves still get let in, possibly just with a fine, since they get a change to explain themselves calmly and correct their mistakes and the officers come across as trying to help people rather than trip them up.
> He could have simply stated that the question can be answered with varying degrees of sophistication, but an ultimate "why" is not to be found.

That seems to me like a pretty vacuous answer. An "ultimate why" is almost never possible, saying that he couldn't answer the question would have been inaccurate, and just saying that he could only answer the question in a way that the audience couldn't understand would have been a hell of a lot more patronizing.

I think you may have missed Feynman's point about "why" questions. He wasn't merely pointing out that you can keep on asking "why", and he wasn't saying that there was something wrong with asking "why". He was pointing out that where you let it stop depends on the context. In the context of everyday non-physicist understanding, you really can't correctly answer "why do magnets repel?" with anything much deeper than "they just do", but if you're willing to bring in significantly more advanced concepts you can go several layers deeper and explain the math behind interaction of magnetic fields and how ferromagnetism arises and so on. But there's a pretty big gap between the layman explanation and the next most detailed explanation that isn't highly misleading.
Yup... my comment about "detracting from the point" was about such an important semantic change to slip through unnoticed. (not about the points delivered in the talk itself or anything)

There's nothing wrong with if/elses, but I strongly prefer pattern matching, where available. And even more, I think it's important to keep computation and presentation separate... that is, to not entagle IO with the rest of the code.

(Unfortunately Haskell is the only language I know of that gives you a tool to tackle that)

Obviously this was just a small example, but I've seen unintended IO byte back the developer in real world (Python) code.

And another small comment: since I haven't bothered to comment on Hettinger's talk before now.

I liked it (but played it back at 1.5x)... but since it's not first talk by Raymond Hettinger I saw, I knew that his delivery is good. Some of the stuff (should?) be obvious to every (Python) developer (but repetita juvant). I didn't like the jab at Java for the mistake of iterating over indexes: there's no excuse to writing that code not even there (look at the Iterator and Iterable interfaces)
> She was treated like a criminal (ignoring the fact that she was, in fact, a criminal, accidentally or not).

No. Simply making a mistake on a visa application is not a crime, nor is overstaying a visa. It counts as "Unlawful Presence", which is a civil offense; in order to rise to the level of a crime, it must be "Improper Entry", which involves crossing somewhere other than a designated border crossing, deliberately lying on application forms, or the like.

One thing that people really need to be aware of in immigration law is the difference between an unlawful act and a crime. Lots of rhetoric about immigration talks about how people are already criminals for being in the country undocumented, when in fact they have violated no criminal statues, merely civil.

Actually, I think that this may not have even constituted unlawful presence; since the author was not yet technically in the country until exiting the airport, she was essentially just turned away at the border (with a brief detention for practical reasons). Note that I am not a lawyer, and not all that familiar with immigration laws, so take my interpretation with a grain of salt; but I am certain that there's a very big difference between civil and criminal violations, and committing a civil violation does not make one a criminal.
I have to imagine many of the people who argue that sustained caloric deficits do not lead to weight loss are engaging in magical thinking to justify their weight.

Guys, metabolism is just too complicated for humans to understand, so there's nothing at all I can do about being overweight, it's literally beyond my control

There's got to be some kind of cognitive dissonance or something at play; how else could a rational mind convince itself that the laws of thermodynamics do not apply to the human digestive system?

Or the justifications that say, nutrition labels are not PERFECTLY accurate so it's hopeless from the start. I personally guarantee if you drink one can of Coke a day and eat nothing else, you will lose weight; I don't care whether the nutrition label is perfectly accurate.
If my coworker would come to me and show me his results where he measured that the "Labels as Values" implementation is not need while "on his Haswell CPU the speedup is only 3%" I'd just ask "can it be guaranteed that the code you propose to revert to the plain switch will run only on that CPU?"

If not and the switch is in the performance sensitive place I'd keep the "Labels as Values" implementation.

There are many more CPUs in the world than "the latest Intel x86 CPU." Kudos for the developers of Haswell, but don't blindly trust the Inria researchers that tell you "Don’t Trust Folklore."

I also don't like that this research was "partially supported" by the European grant thus explained: "ERC Advanced Grants allow exceptional established research leaders of any nationality and any age to pursue ground-breaking, high-risk projects that open new directions in their respective research fields or other domains." (1)

1) http://erc.europa.eu/advanced-grants

Is ground-breaking, high-risk research discovering that the algorithm in the latest Intel processor matches the one other researchers (which I respect much more) discovered in 2006, and variant of which won more "branch prediction championships"? I'd say no.

At least they honestly write about the fact that the given algorithm is already known as highly efficient.
No. Unless you're into non-profit, education etc..
Germany will pretty much extend you the red carpet: getting a visa takes a couple of weeks and the deal is pretty decent.

There are some societal problems with xenophobia and racism though. Probably affects Muslims the most. Avoidable by going to a major city like Berlin or Hamburg.
I don't agree. He really took the opportunity to teach an important lesson very effectively.

It just goes to show, even if one makes some really cool stuff, someone on the internet will find offense in it.
Well, I think the truth lies somewhere in the middle. He always had a very brash, blunt delivery, and here its as evident as ever. But his underlying point is a good one.

The trouble is that the interviewer asked an unwittingly complex question. The tricky thing about gravity or magnetism or light or what have you is that our daily experiences with them seem so simple, and yet underneath they're deeply complicated and unintuitive.

The result is that physicists try to explain things with metaphors that don't actually work, in the hopes of making the unintuitive intuitive. The result is a kind of pseudoscience that causes lay people to come to poor conclusions.

For example, to explain global climate change you might use a metaphor of a greenhouse. Except that tricks people into thinking that the globe just warms uniformly. Then any cold winter is used as evidence to disprove the theory when all they're doing is disproving a bad metaphor.

So here Dr. Feynman uses this simple question to illustrate how complex some things can actually be.

While also coming across as a bit pompous, unfortunately.

As an aside this video is part of an amazing series. They're all worth a watch, IMO.
We built our own quad-titan devbox a few months ago, same general components as this, except used Core i7-5960X and threw in a few 1TB samsung SSD's in Raid, came in just at $9,000 USD hardware cost, which I think Nvidia was charging about $15,000. Still, I'm sure they aren't making a ton of money, and you get hardware guarantee with configuration (but config wasn't so bad..).
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Agreed. The ethical implications of this also need to be considered. As much as I hate the "think of the starving children in ___" trope, artificially increasing your matabolism is increasing the amount of calories humanity needs to produce, and if use becomes widespread, could add up to a significant amount.
467*10^3 immigrant visas, not 10^6!
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OSX has iTerm. Windows has Putty.

For goodness sake you'd think that some big company like Microsoft would want there to be a good, free SSH terminal for Windows.
I'm willing to concede the term "criminal" in exchange for "unlawful entrant" in this instance. Using "criminal" is actually a bit more than what was deserved for describing both her treatment and her infraction. At the time it seemed to flow better, but I'm all for accuracy.
The average human is advised to drink eight 8oz glasses of water each day. That's 182 gallons of water per year. Next time you go shopping, count out 182 1-gallon jugs of water. Each and every year.

I understand the pitfalls of sugar. But I don't think these kinds of analysis by themselves really teach us anything.
The (defcon.org) URL says enough I think
Please do not suggest this unless you know the full story. The conditions are bad, the pay is terrible, and the legal environment is most unpleasant.

And due to cyber security laws, you will notice no one is going to sat more than that in a GCC state.
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I'm not offended, but I would have been irritated if I was the interviewer.

Don't you think the mature man Feynman was talking to already knew what he was talking about with his "why" sermon? Do illiterates really go around and interview Richard Feynman? It was just out of place, really.
Looking at that video again, I don't understand why you'd think he was a jerk there (Feynman could be called a jerk for other things he did in his life, but IMO never for the way he tried to explain physics to non physicists). His answer was as clear and concise as he could make it, and he even faults himself for the lack of deeper explanation: Magnetism is (in a slightly simplified manner) one of the fundamental forces, so he does not understand it as something that can be explained further, using any analogy understood by laymen. He also explains why analogies don't hold up here and how magnetism is more fundamental than collisions between macroscopical objects (the hand on the table). He also says that it's an 'excellent' question (from the point of view of a curious mind), after which he explains the flaw inherent to the question.

Asking the right questions is an important concept in science, and I also often have difficulties with people who find it rude when a question itself is analyzed, sometimes turned back, before actually being answered. People who always want simple answers to seemingly simple questions IMO tend to have a fundamantal misunderstanding of reality as we know it from a scientific viewpoint.
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The ETSA shouldn't be any less valid just because you applied for a visa (denied or not) first. As far as I understand the visa was still being processed too.
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Can fiber impact absorption? Yes. Can fiber be absorbed (and digested)? No. Which was my point one comment ago.

Are your macros important to health and good body composition? Yes. I usually skip that part because someone inevitably jumps in and explains how sugar is metabolized differently than fat, and then try to use that to "prove" that sugar will make you gain weight no matter what your caloric intake.
I'm thinking that joshu did, IIRC
Investigating suspicious claims when people arrive at immigration control is perfectly reasonable; if you claim to be speaking at a conference but they can't find any indication that said conference exists, holding on to you for a while makes sense. I hope that, even without your invitation letter, you eventually managed to put the CBSA agents in contact with someone who could verify your bona fides and they let you into the country though?

To me, the largest problem with the reported story isn't that they weren't allowed into the US -- applying for a work visa, then trying to enter as tourists when you don't get the work visa is definitely suspicious behaviour -- but rather that they were kept in jail until they could be deported. These were not dangerous individuals; they could easily have been told to go find a hotel and stay there overnight but report back to be deported in the morning.

Which, incidentally, is exactly what happened to a BSDCan attendee a few years ago when he was deemed inadmissible to Canada a few years ago: "You're not allowed in, but it's too late to send you back tonight and you seem harmless, so we're going to give you a 24 hour pass. Be back here at 9 AM tomorrow."
That's been my impression as well. It seems like the same thing you see a lot of heavier people say ("oh, it doesn't work for me") except with more complex language ("oh, it's much more complicated than that. We understand nothing about this, this rough model is completely unhelpful!").

I really wouldn't have expected that sort of reaction on this forum ahead of time. It's a bit disappointing.
He didn't know they had copies (assuming they even did; I think it's more likely they were able to reconstruct the deleted data, given that deleting a file is just removing its dirent, and formatting a drive is just recreating the filesystem metadata). As far as he knew, the entries in his browser history were the only records of those searches, or whatever.

That makes the action (assuming it was done with intent to destroy the evidence, and not merely an automatic, "quitting the browser purges its history" type thing) illegal.

Consider the analogous situation of two companies, both engaged in illegal activities:

Company A has a standing, published document retention policy that says that all financial records must be destroyed after 30 days.

Company B has someone sneaking in at night to shred the records of their profits from selling meth to schoolchildren.

The Feds have copies of both of their records, because they have someone on the inside copying them and turning them over.

One company's relevant employees are going to face one set of charges. The other's are going to face two. Can you guess which is which?
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> He always had a very brash, blunt delivery, and here its as evident as ever.

Is half a minute of Socratic method leading into a comprehensive lecture answer really rude enough to call "very brash"?
Completely OT but was that the reason they divorced?
Video was from 2007 and Wiki says they broke up in 2008
>This makes sense in native-is as well as web based applications. The fact is, with as much variety as there is, there really isn't a canonical application profile that's consistent everywhere... so trying to make a nice looking app should be the first priority over making it look like {insert os here}.

Looks are nice, but it's about behavior too. One of the reasons I hate web apps and web apps in desktop wrappers is because their behavior is totally inconsistent with that of the OS (and often, of any OS). I really hate this because it greatly dilutes OS choice for all the wrong reasons.
I felt the same.

I found the following by perusing the first few search results for obvious search terms:

http://www.quora.com/What-is-a-good-strategy-for-Risk-the-bo...

It might be a good start at answering the questions raised here...
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The "operations" package is more sort-of "official" client, used by SeaweedFS itself.

The feature list is still growing. I prefer not to really have an official GO API before I can have time to polish the API design.
http://www.citylab.com/tech/2013/09/heres-where-youre-most-l...
He was pointing out that where you let it stop depends on the context.

And there you have said it. I haven't missed the point. Feynman did by not acting on the context of the interviewer's question. Of course he had to stop somewhere in his explanations. But he definitely could have talked about magnetic fields, and electrons, and spin, etc. instead of giving a sermon.

Really, by that logic, he could simply have stopped the interview and sent the journalist to college for a physics degree.
>>>> Obesity is a self-inflicted issue.Consuming more calories than you burn is all it is.

- Why is this restaurant always full of people ?

- Because there are more people entering the exiting.

Really ? Maybe it has to do with the food quality, price, customer care, the location of the place, etc, etc.

See, explaining obesity with the simple calories-in, calories-out argument tell nothing about the root cause of this disease.

Take a look at Dr. Guyenet blog[1] for a fascinating view of this issue.

[1] http://wholehealthsource.blogspot.com
This doesn't seem like a good source of Android news. The writer writes mostly about iOS and makes a lot of glaringly obvious mistakes when writing about Android. Note in this link talking about Stagefright like it is the name of an exploit when really it is the name of the media framework used on Android.
I say this because the application of that reasoning doesn't discriminate between individuals actually trying to defraud (e.g., this gentleman) and those who are privacy conscious.

But it does. If you're legitimately purging your browser history because you're privacy conscious, you're almost certainly going to have it performed in some sort of automated fashion. Maybe you have the browser purge those things on shutdown. Or you have an extension that nukes things older than 24h. Or, worst case, hopefully you have some way of demonstrating that you do this on the regular, by hand (but that still might not cover you, truth be told).

Doing it one-off is a completely different matter, legally speaking.

See my reply elsewhere in this subthread for an analogous situation involving company financial records. [1] Nutshell: if you don't want to be prosecuted for obstruction of justice or destroying evidence, you have a standing, documented, and meticulously followed document retention policy, under which you're shredding things on the regular.

There is unambiguous, and well-settled precedent (and probably also statute, but I'm too lazy to look it up) to this effect. There is no new legal ground being broken here whatsoever.

[1] https://news.ycombinator.com/item?id=10032792
Brash doesn't necessarily equate to rude, or at least it doesn't to me, though I admit I may be using it incorrectly.

I've watched a lot of Dr. Feynman's talks. His style is very... I don't know how else to describe it except brash. Aggressive is too strong a word. Forceful? Doesn't feel quite right. Compare him to Sagan or Green or Kaku or any number of others and Feynman always felt like he had these rough edges that never got filed off. IMO its part of what makes him relatable, that lack of polish.