Starting a Sentence with a Conjunction My high school English teacher taught us to never start a sentence with conjunctions, but throughout the years I have seen a lot of such usage in academic writings and novels. I have also read various articles, saying that such usage is now acceptable. Is it merely a preference of style or is it grammatically wrong? Does it otherwise imply different semantics from the usage that follows a comma(,)?  For example, are the following sentences acceptable in terms of grammar/formality?   "The organization should have taken the blame. Or, its leader can sacrifice himself for the well-being of all." "She is one of a kind – she displays high empathy on each and every strangers she meets. But, she lives in a fiction." "The city is wondrous, in spite of its proximity to my hometown. And, a highly regarded culture resides there."   Thanks in advance.
Is it really incorrect to start a sentence with "and"? I know it's wrong, but I do it all the time or else my sentences would go on forever.
Can I make a custom node from a group and have that available in other projects? I've found some neat combinations of nodes to create certain effects, so I'd like to make them a group and then have that node available on my list of available nodes, even when I reload the startup file. How would I do that? Can I boot memtest86+ if I'm using UEFI? Downloaded the Ubuntu 16.04.2 .iso install disk and flashed it onto a USB stick.  Booting on the USB stick, there is no memtest86+ option (along with "Try Ubuntu").  Is there a way to add it to the install options?  (it's for a UEFI boot PC running normally Windows, its owner does not want to install Ubuntu. "memtest86+" is completely free (unlike "memtest86"), but is quite old, and does not offer a UEFI boot - this is why having it within the Ubuntu options makes things easier) We know that $221 = 17*13$. So we can check if the system has roots to both of those equations separately, which it does:  $x^{5} \equiv 2$ mod $13$ has the solution $6 + 13n$ and $x^{5} \equiv 2$ mod $17$ has the solution $15 + 17n$.   I got these numbers from wolfram, I have no idea how to solve this problem WITHOUT a calculator. And even after finding these numbers. How would one obtain a solution modulo $221$? I was thinking the Chinese Remainder Theorem but I am under the assumption that CRT only applies to problems with powers of $x$ which are $1$.  Thanks. Prove that ${x dy - y d x\over x^2 + y^2}$ is not exact Why L1 norm for sparse models Logistic Regression - Adding interactions makes Independent variable statistically insignificant My name is Abhi &amp; I am trying to better understand logistic regression by solving a few practice problem. I am using R and RStudio as the development environment  Problem Statement  Given the age, sex and class(first,second,third) for each passenger can you predict if he survived or died when the titanic sank   Attempt1  Simple Logistic Regression. Use age,sex and passenger class directly. The formula (in R)  Survived~Pclass+Sex+Age  This gives fairly decent results - accuracy of 79% and all of independent variables are statistically significant   Attempt2  Add interactions between age,sex and passenger class. Accuracy has improved to 80% but age is no longer significant. Also none of the new terms(age-sex,age-class,sex-class,age-sex-class) are statistically significant. The formula (in R) Survived~Pclass*Sex*Age   Can some one explain why this is happening? I can accept that the new terms may not be significant but why is age no longer significant?   Any help would be much appreciated I've heard that i can travel to the US any time before my tourist visa expiry.  Is that true?  (please advise) Is Cursed Child canon to the original story? From what I am hearing the stage-play called The Cursed Child is based on the characters from the Harry Potter series. It is set 19 years from the end of Deathly Hallows (i.e. When Harry's children are starting their time at Hogwarts).   I have also seen the J.K. Rowling has had at least some involvement and been on the set and a part of rehearsals, etc.   My question is has there been a statement given relating to the canon of the stage play to original series? If so, would any conflicting information be considered a retcon?  Related:  - but not dupe because this asking about in-universe information. Simple logic problem: Finding largest and smallest number among 3 numbers Every time I insert the SD card from my camera into the card reader, I get this dialog:    Of course there is no need to scan it. Is there a way to disable it? Boot Error - ACPI PCC Probe Failed ACPI PCC Probe Failed is the error that pops up instead of the default GRUB loader after I updated my kernel to 3.19.  I searched around and couldn't find much information except that it is a known error and it is registered in kernel.org's launchpad . My question is, is anyone else facing it?, what are the impacts of this? And if only an update in the future can fix it, any suggestions or safety tips till then? Splitting a large document into several files Can Dementors die? Based upon , J.K. Rowlings has apparently stated "You cannot destroy Dementors, though you can limit their numbers if you eradicate the conditions in which they multiply, ie, despair and degradation."  Does this mean that the number of Dementors is always either increasing or remaining the same?  If they cannot be destroyed, does that mean they are immortal?  Or do they die of "natural causes"? Generating Random Passwords When a user on our site loses his password and heads off to the Lost Password page we need to give him a new temporary password. I don't really mind how random this is, or if it matches all the "needed" strong password rules, all I want to do is give them a password that they can change later.  The application is a Web application written in C#. so I was thinking of being mean and going for the easy route of using part of a Guid. i.e.  Guid.NewGuid().ToString("d").Substring(1,8)   Suggesstions? thoughts? Why (...) doesn't spawn a new child process when run in background? What is the CVE-2014-6271 bash vulnerability (Shellshock) and how do I fix it? How to unlock Sweet Tooth in Rocket League? How do you get Sweeth Tooth's ice cream van (from Twisted Metal) in Rocket League? I need to print an image at a certain size. What dimensions and resolution should I use? Is there a better name for this than "emphatic and"? In semi-poetic writing, I have had occasion to deviate from the standard prose list practice (interpose commas or semicolons between items, with an "and" preceding the final item), by utilizing a second or third and to separate three or four items.  That is,       Bob likes beer, wine and liquor.   The variant would be:     Bob likes beer and wine and liquor.   Now, the usage is obviously nonstandard and should be avoided in formal writing, but for those instances where poetic variation may be justified.    What is it called?  "Emphatic And" is the best I can coin on my own, but I wonder if there is a more established name for this variation. Is there a simple, constructive, 1-1 mapping between the reals and the irrationals? Is there a simple, constructive, 1-1 mapping between the reals and the irrationals?  I know that the Cantor–Bernstein–Schroeder theorem implies the existence of a 1-1 mapping between the reals and the irrationals, but the proofs of this theorem are nonconstructive.  I wondered if a simple (not involving an infinite set of mappings) constructive (so the mapping is straightforwardly specified) mapping existed.  I have considered things like mapping the rationals to the rationals plus a fixed irrational, but then I could not figure out how to prevent an infinite (possible uncountably infinite) regression.