StackExchange Hot QAs
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Personal daily digest of StackExchange.net hot QAs
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Nazism and Jewish persecution awareness during the WW2 years

I've always wondered how is it possible that an entire nation and beyond (Germany) wasn't aware of the Jewish persecution during the WW2 years or, if they were, that they did nothing to stop it.

Sean Roh's insight:

I have read a book that tries to delve into this phenomenon: James Waller's Becomming Evil: How Ordinary People Commit Genocide and Mass Killing (at the moment, wikipedia claims this is the standard college textbook on the subject). His basic thesis is that under the right circumstances most (not all, but most) ordinary people will quite willingly participate in mass evil of this kind. Passively sure, but even actively, if called upon to do so.

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How can I express strong emotions without using Biblical or profane language?

Very often I find myself looking for a way to express that I'm amazed, surprised, disappointed, annoyed, etc., but the only words I can come up with are:


"Oh my God! Jesus Christ! For the love of
Sean Roh's insight:

Goodness gracious!

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Splitting a sandwich and feeling not deceived

Splitting a sandwich and feeling not deceived | StackExchange Hot QAs | Scoop.it

Let's say there are two people and a sandwich. They want to share the sandwich, but they don't trust each other. However, they found the way how both of them will have a lunch without feeling deceived: One of them will cut the sandwich in two halves, and another will choose which half will be his. Fair, right?

 

The problem is:

Is there such mechanism for three people and a sandwich?

Sean Roh's insight:

Yes, see Wikipedia: Category:Fair division and in particular Selfridge–Conway

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Allowing unmarried/homosexual couples into a hotel

Recently there has been a high profile case in the UK concerning a religious christian couple who own a hotel. Due to their personal religious beliefs their policy was to refuse a room to couples who were not married.


They refused a 'married' homosexual couple a room on the grounds that they were not of the same 'orientation', which went against their religious values. They said that it would feel wrong to allow it and that they would feel more trepidation answering to God than the justice system.


Sean Roh's insight:

There is a key distinction between enabling a sin -- which is a very serious problem vs. simply assisting a sin.


In virtually all cases that come up today, these are questions of assisting rather than enabling. Do I really think this couple will sin any less if I refuse them the room? Generally, for non-Jews or non-observant Jews, we say it's best to avoid assisting if reasonably possible, but the letter of the law is that it's permissible. (I.e. you shouldn't get yourself sued over it.)

 

Rabbi Michael Broyde has observed that evangelical Christians don't accept this distinction of assisting vs. enabling; we have a very old, nuanced, and profound religion, and we do.

 
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Why does a helium filled ballon move forward in a car when the car is accelerating?

I noticed that when I had a helium filled, latex ballon inside of my car, it moved forward in the cabin as I accelerated forward. The faster I accelerated forward, the faster the ballon went from the
Sean Roh's insight:

The balloon doesn't know and doesn't care if the acceleration is from gravity or from the acceleration of the car; it just tries to move in the direction it naturally moves, namely, against the direction of the acceleration.

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Riddle: 1 question to know if the number is 1, 2 or 3

I've recently heard a riddle, which looks quite simple, but I can't solve it :

 

The girl thinks of a number which is 1, 2, or 3

 

The boy then asks just 1 question about the number

 

The girl can only answer "Yes", "No", or "I don't know"

 

And after the girl answers it, he knows what the number is.

 

What is the question?

 

Note: girl is professional in maths and knows EVERYTHING about these three numbers

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Why is it not appropriate to appropriate?

When used as a verb, the word appropriate means "to take (something) for one's own use, typically without the owner's permission". Basically, stealing.

However, when used as an adjective, the same...
Sean Roh's insight:

Its can be appropriate to appropriate. But its always inappropriate to misappropriate.

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Does microwaved water kill plants

Does microwaved water kill plants | StackExchange Hot QAs | Scoop.it
I have seen this story a couple of times in my facebook newsfeed and it strikes me as highly unlikely. The story goes:


Below is a Science fair project presented by a girl in a secondary
schoo...
Sean Roh's insight:

Microwaves are non-ionizing radiation, so do not alter the substance other than exciting it to higher temperatures. (Wikipedia:Non-ionizing radiation)

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Surprising identities / equations

Surprising identities / equations | StackExchange Hot QAs | Scoop.it
What are some surprising equations / identities that you have seen, which you would not have expected?

This could be complex numbers, trigonometric identities, combinatorial results, algebraic res...
Sean Roh's insight:

"This one by Ramanujan gives me the goosebumps"


"Its witchcraf"


"Ramanujan used to say a goddess revealed those identities to him in dreams"

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Can Linux "run out of RAM"?

I saw several posts around the web of people apparently complaining about a hosted VPS unexpectedly killing processes because they used too much RAM.

Sean Roh's insight:

Once the process has taken all the RAM, it will also fill up the disk because it is writing to swap and I am left with no more RAM and no more space to swap into (people tend to limit swap to a dedicated partition rather than a swapfile for exactly that reason). That's where the OOM killer comes in and starts killing processes.

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Why and how do "bigger pixels" make a better picture?

Why and how do "bigger pixels" make a better picture? | StackExchange Hot QAs | Scoop.it
Sean Roh's insight:

It is one of those rare marketing ploys that is also true.

 

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failure - Was the NOAA-N Prime satellite really dropped on the floor?

failure - Was the NOAA-N Prime satellite really dropped on the floor? | StackExchange Hot QAs | Scoop.it
Sean Roh's insight:

Yes, it really happened.

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What creates the chaotic motion on a double pendulum?

As we know, The double pendulum has a chaotic motion. But, why is this? I mean, the mass of the two pendulums are the same and they have the same length. But, what makes its motion random?

Sean Roh's insight:

http://www.youtube.com/watch?v=AwT0k09w-jw

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Is this image about child teeth development accurate?

Is this image about child teeth development accurate? | StackExchange Hot QAs | Scoop.it

Is this image accurate (as a representation of a child's skull during normal teeth development)?

Sean Roh's insight:

So, I assume there're no obvious inaccuracies in the scary picture from question.

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Is it bad practice to use your real name online?

On some accounts I use my real name on-line(G+/fb/wiki/Personal blog), others(Q&A/Gaming) I use an alias.


My question is: Security and privacy wise, what can people do with my real name? What are the harm, and dangers of using your real name on-line.

Sean Roh's insight:

This is actually an interesting new field in infosec - reputation management.

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Friends come with hat in hand, but I don't think it will help

I have two friends, a married couple with a ~1yr child. Shortly before they had the child, they moved in with his grandparents. The grandparents are apparently unwilling or unable to care to the ch...
Sean Roh's insight:

"Annual income twenty pounds, annual expenditure nineteen [pounds] nineteen [shillings] and six [pence], result happiness. Annual income twenty pounds, annual expenditure twenty pounds ought and six, result misery."

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Why is the "ph" pronounced like a "v" in "Stephen"? Is this the only word like that?

While I know how my name is pronounced, I've run into many non-native english speakers who have stumbled over this unique exception to English. Even in the female name, "Stephanie", the ph is pron...
Sean Roh's insight:

"Stephen and Steven are exactly the same name, but the former merely has an anachronistic spelling."

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Many readers, one writer - is it possible to avoid locking?

Say you have an in-memory list of strings, and a multi-threaded system, with many readers but just one writer thread.

In general, is it possible to implement this kind of system in C#, without usi...
Sean Roh's insight:

Yes. The trick is to make sure the list remains immutable.

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How can I search Google for a negative number?

It only rarely happens, but once or twice I've found it desirable to be able to search the web for a set of search terms that includes a negative number. Unfortunately there doesn't seem to be any
Sean Roh's insight:

The short and sad answer is:

You can't!
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When walking on the road, is it safer to walk in the same or opposite direction as the traffic?

I don't know this question will qualify for this site or not, but, I have this question.

When you are walking on the road anywhere (any country, city, etc),


Which is safer? Walking in the dire...
Sean Roh's insight:

Walking in opposite direction of the traffic.

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Using "apologize" without "for"

Is it grammatically correct to use "apologize" as a verb without the preposition "for"?


apologize:
to make a formal defense in speech or writing.


"I apologize the event."

Wouldn't this ...
Sean Roh's insight:

It shows up in modern Non-apology apologies:

 

Attorney and business ethics expert Lauren Bloom, author of The Art of the Apology, mentions the "if apology" as a favorite of politicians, with lines such as "I apologize if I offended anyone".

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Is it possible to manage without cash, but with credit cards only when visiting San Francisco?

I have managed in the UK to go around without Pounds. You can easily go around the UK with credit cards only. Even paying for a beer in the pub, a bus ticket, or a train ticket is just a question of
Sean Roh's insight:

Yes. Absolutely. Almost all that you mention and tips can be paid using credit cards in almost all of the USA.

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Did Pascal write: "Men never do evil so completely and cheerfully as when they do it from religious conviction."?

Sean Roh's insight:

At the IMO slight risk of using a False friend in the following translation:

 

"One never does evil so fully and gaily, as when one does it through a "false principle of conscience."

 

IMO only a atheist with no sense of history or of the text could translate or interpret "false principle of conscience" there as "religious conviction".

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US and UK spy agencies defeat privacy and security on the internet

US and UK spy agencies defeat privacy and security on the internet | StackExchange Hot QAs | Scoop.it
Sean Roh's insight:
What can I do?

Start by reading the article NSA: How to remain secure against surveilance written by Bruce Scheier.

 
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