TASK DEFINITION: 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.
PROBLEM: Question: Possible Duplicate: Why don't we use the indefinite article with 'software'? In France I have always been told that saying "a software" is not correct English (as a nominal compound), and that "a piece of software" or "a software program/package/product/system" must be used instead. Recently I have doubts... is there any case where it is actually correct? Examples found on the Internet: SalsaJ, a software for data analysis at school So if you sold a software which required your customer to pay a monthly fee, [...] 
Answer: Think of it this way: would you say "a tableware" or "a glassware"? The word "ware" means "commodity". Everything that applies to "tableware" and "glassware" also applies to "software". The correct usage is "a piece of software" or something in that vein. I prefer "a program" or "a computer program" myself. Other alternatives are: an application, a computer application, an app, a software tool. (FWIW: as a software developer myself, I assure you that devs never use the term "a software" when they communicate.).

SOLUTION: no

PROBLEM: Question: I'm looking for a word the describes the concluding text of a document, i.e. the opposite of the document's preamble. Is it just "conclusion"? 
Answer: Conclusion, afterword, and epilogue all seem to fit the bill. There's also postamble, but I believe that's more of a computer science term for data transactions.

SOLUTION: yes

PROBLEM: Question: I am just wondering about the difference between: in contrast to and in contrast with 
Answer: In fact, they could be used interchangeably, however, "in contrast with" is more common in UK English. Moreover, When we say "contrast with", CONTRAST is behaving as a verb. Example: "He likes to contrast his checkered jacket with plain pants" or "his checkered jacket contrasts with his plain pants." But when we say "in contrast to", it is behaving as a noun. Example: "His checkered jacket stands in contrast to his plain pants." (As you can see, in this sentence "stands" is the verb). (Testluv, GMAT Instructor, Beat the GMAT forum).

SOLUTION:
yes