Generate the answer for a given question. The question requires common knowledge of English. Make sure that the answer is in detail, long, consistent with the context, and requires general knowledge of English. To be less repetitive, please vary your language for each question. Give a proper explanation to answer, and if necessary, provide the definition of various terms. And conclude your answer if it's long. If you have used other resources (e.g., Merriam Webster's.) to answer the question, include citations in your answer. You don't need to paraphrase the context of your resources, but make sure that your answer is consistent and complete.

Ex Input:
Wikipedia says: A postscript may be a sentence, a paragraph, or occasionally many paragraphs added to, often hastily and incidentally, after the signature of a letter or (sometimes) the main body of an essay or book. When all letters were handwritten, and adding a new thought to the letter would have likely involved rewriting the entire letter, a postscript had obvious practicality. Now, however, one can just as easily add the thought to the main text.

Ex Output:
I use a P.S. rather often in my emails, when the content of the P.S. is unrelated to the rest of the body of the message. For example, if I was writing two or three paragraphs about a database problem to a colleague, but I knew his wife had been recently released from the hospital, I might end the message with something like: P.S. I hope your wife is doing better. That's an easy way to make an abrupt transition to something unrelated to the rest of the message. Such modern usage isn't driven by an inability to conveniently insert the text (which is easily done electronically) it's more a matter of how much that closing thought is related to the rest of the message. P.S. You know you can't believe everything you read on Wikipedia, right?

Ex Input:
Coming from a technical background I'm slightly confused. What is the difference between simultaneously and concurrently? How do we use these words?.

Ex Output:
I just looked these up in an online dictionary; this is what I found: concurrently: overlapping in duration simultaneously: at the same instant Both of them mean 'at the same time,' and are almost interchangeable. That said, if I had to point out a slight difference, I'd say that concurrently occurs over a longer time, and is a bit less synchronized than simultaneously. For example: The two processors were running concurrently, then they crashed simultaneously. In that example, I wouldn't swap the two words in question.

Ex Input:
Consider the following two sentences: Statement 1: The parameters were calculated a priori, and the other variables were calculated iteratively. Statement 2: The parameters were calculated a priori, and the other variables were calculated iteratively. This may seem trivial, but the only difference between the two sentences is the way in which the , has been formatted. In the first statement the , is in italics. In the second, the , is not in italics. Does it depend on the writer whether or not to italicize the punctuation marks adjoining the affected words? Or is there a definite rule governing this? The same question can be extended to other types of formatting, e.g. bold.

Ex Output:
Here's one style manual's answer to that question: Italics do not include punctuation marks (end marks or parentheses, for instance) next to the words being italicized unless those punctuation marks are meant to be considered as part of what is being italicized: 'Have you read Stephen King's Pet Semetary?' (The question mark is not italicized here.) Also, do not italicize the apostrophe-s which creates the possessive of a title: 'What is the Courant's position on this issue?' This is really a style-manual problem, not an English usage or grammar problem. Each publication has its house style. Newspapers have their own style manuals, academic fields have theirs, and technical fields have theirs. There is no definite rule.