Why connection is "pronounced" as C while "concert" is pronounced as K
Is there a rule to know when to pronounce letter c as a "soft c" (s) or "hard c" (k)?
How bug prioritization works in agile projects vs non agile When reporting a defect, we are setting the priority and severity of the defect. How this works with agile development? Is there any specific way ?  How bug prioritization works in agile projects vs non agile.?  Is there any other way of measuring the priority of a bug in agile projects? How to find out how many games I have won with a specific race on ladder 1v1?  The profile screen just gives me the total wins and losses but I play with all three races and I would like to know my stats per race.  Thanks.  PS: I have been playing Starcraft from the release date but I don't have the old replays as I format my computer often. Find the eigenvalues and eigenvectors with zeroes on the diagonal and ones everywhere else. I have been working on this problem for a couple hours and am completely stuck. Any help would be greatly appreciated.  Let $A$ be the $n \times n$ matrix which has zeros on the main diagonal and ones everywhere else. Find the eigenvalues and eigenvectors of $A$. Identify $P(2014)$ if $P(i)=1/i$ for every positive integer $1\le i\le2013$ What's the bad magic number error? What's the "Bad magic number" ImportError in python, and how do I fix it?  The only thing I can find online suggests this is caused by compiling a .py -> .pyc file and then trying to use it with the wrong version of python. In my case, however, the file seems to import fine some times but not others, and I'm not sure why.  The information python's providing in the traceback isn't particularly helpful (which is why I was asking here...), but here it is in case it helps:  Traceback (most recent call last):   File "run.py", line 7, in &lt;module&gt;     from Normalization import Normalizer I am trying to really understand why the gradient of a function gives the direction of steepest ascent intuitively.  Assuming that the function is differentiable at the point in question, a) I had a look at a few resources online and also looked at this   , a popular question on this stackexchange site. The accepted answer basically says that we multiply the gradient with an arbitrary vector and then say that the product is maximum when the vector points in the same direction as the gradient? This to me really does not answer the question, but it has 31 upvotes so can someone please point out what I am obviously missing?  b) Does the gradient of a function tell us a way to reach the maxima or minima? if yes, then how and which one - maxima or minima or both? Edit: I read the gradient descent algorithm and that answers this part of my question.  c) Since gradient is a feature of the function at some particular point - am I right in assuming that it can only point to the local maxima or minima? Regular Expressions: Is there an AND operator? Obviously, you can use the | (pipe?) to represent OR, but is there a way to represent AND as well?  Specifically, I'd like to match paragraphs of text that contain ALL of a certain phrase, but in no particular order. If I seem tired, can I say: "I haven't slept last night"? If not, why have I been told that we use present perfect for actions that have present effects? Inequality involving the sup of a function and its first and second derivatives Let $f:\mathbb{R} \to \mathbb{R}$ be a twice differentiable function. And let  $$\eqalign{   &amp; M_0  = \sup \left|f(x)\right|  \cr                &amp; M_1  = \sup \left|\frac{d}{dx} f(x) \right|  \cr                &amp; M_2  = \sup \left|\frac{d^2}{dx^2} f(x) \right| \cr }$$ Prove that  $$M_1 ^2  \leqslant 4M_0 M_2$$ I can not think how I can relate these values ​​in some inequality )= How do you tell what brand/make/model of bike I have? Understanding quantum entanglement.. help me validate this analogy! I'm struggling to understand the concept of quantum entanglement. I've distilled my understanding into an analogy, and I need your help to validate it. Here it is:  Let's say I receive two envelopes. Both envelopes have this written on them:     Hello! Open this letter...   If the paper inside is red, then other envelope has blue paper.   If the paper inside is blue, then other envelope has red paper.   So, if I open one letter, and the paper inside is red, then I know the other letter contains the blue paper.  Is this equivalent to quantum entanglement? The fact that I will know the color of the other paper when I open (i.e. observe) one envelope?  In theory, if one of the letters "appeared" in a different galaxy, I would still know the color of the paper inside that letter, just by opening my letter, instantly, correct?  Before I open the letter, is the paper inside each envelope in superposition (??), i.e. 50/50, red or blue?  In this analogy, I am assuming that what's written on the letters is true. Is this a correct assumption in quantum physics? I think so yes?  In real quantum physics, would I be able to change the color of one paper, so that I change the color of the other one? No right? I have a 12-hour layover in Istanbul. Will I be able to leave the airport to do some sightseeing in the city? I'm flying to Barcelona from Israel via Istanbul. The layover in Istanbul is 12 hours, and I'm thinking about leaving the airport and entering the country for a couple of hours. Would that be possible? Are there any Border/Airline restrictions?  I'm Traveling with Turkish airlines, and hold a passport which does not require a visa to enter Turkey.  I've done this in the past, but only inside the Schengen area, so this question is Turkey-specific. How to get over "device or resource busy"? What are the best ways to improve a site's position in Google? What are the best ways to improve a site's position in the Google search results? Seeing as C# can't switch on a Type (which I gather wasn't added as a special case because is relationships mean that more than one distinct case might apply), is there a better way to simulate switching on type other than this?  void Foo(object o) {     if (o is A)     {         ((A)o).Hop();     }     else if (o is B)     {         ((B)o).Skip();     }     else     {         throw new ArgumentException("Unexpected type: " + o.GetType());     } } Can we move "Start a bounty" to a more intuitive location? How to backup an Android device? Computing $ \lim_{n\rightarrow \infty}\left(\frac{1^n+2^n+\cdots \cdots +n^n}{n^n}\right)$ Regression without intercept: deriving $\hat{\beta}_1$ in least squares (no matrices) Is there a way to add an error on a dynamically referenced field? Let's take this simple example:  opp.get('Name').addError('Invalid name');   This is not working, I'm looking for a similar minded way.  Thanks