instruction:
Given the Question and Answer pair, detect whether the answer is acceptable or not. Denote acceptable answer as "yes", otherwise denote as "no". An acceptable answer is consistent with the context in question, detailed, long, and uses general knowledge of English. Answers that are not definite and suggest a variety of options are not acceptable answers.
question:
Question: When a user wants to delete something on a website, I would like to display a message for him/her to confirm. Which of the following is the grammatically correct way to say so? Are you sure to delete this item? or Are you sure you want to delete this item? 
Answer: Are you sure to delete this item? Sure means "certain, without doubt". Therefore this asks if they are definitely going to delete the item. This isn't something to ask the user; if anything it's something for the user to ask about the program; "will it definitely be gone". Are you sure you want to delete this item? This asks not about what will happen (which is a question about the program) but what is desired (which is a question for the user). This is the one to go for.
answer:
yes


question:
Question: 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. 
Answer: You seem to have answered your own question, but it's perhaps worth pointing out that in both email and conventional mail a postscript can be a consciously chosen device for drawing attention to what it contains. What might look like an afterthought to the reader might be a deliberate ploy by the writer.
answer:
no


question:
Question: Is there a word for reverse homesickness? Let's say, if you visit a place, and you like it so much, you don't want to leave. 
Answer: The opposite of homesick is "Wanderlust" when you have a big desire for traveling or going to a journey and exploring the world. However there was an interesting comment in a forum about the opposite of homesickness: It's still homesick. "Boy, I am homesick!" "But you live at home." "Yeah, and I'm sick of it!" hope it helps.
answer:

yes