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.

Example Input: Question: Somehow I am compelled to use the word "metal" to describe strong "intestinal fortitude", and perseverance however I can't find the spelling or any synonym like this. Does a word that sounds like "metal" exist when describing an individual's character? I'm looking for modern or historic usage of the word.
Answer: Mettle Defined by Oxford Dictionaries as: a person's ability to cope well with difficulties; spirit and resilience. It is commonly seen in the phrase: (put someone) on their mettle meaning, (of a demanding situation) test someone's ability to face difficulties. 'there were regular public meetings where local MPs were put on their mettle and remorselessly pilloried' Source: ODO Other constructions are possible too, for example: test their mettle, apparently an American version (thanks, @PeterCordes) show your mettle, etc. Origins According to Merriam-Webster, mettle was, as @Sparhawk points out in the comments, originally simply a variant spelling of the word metal (which dates to at least the 13th century), and it was used in all of the same senses as its metallic relative. Over time, however, mettle came to be used mainly in figurative senses referring to the quality of someone's character, with a first known usage in 1581. Today, both words can mean "vigor and strength of spirit or temperament," but only metal is used of metallic substances.
Example Output: yes

Example Input: Question: When should whilst be used instead of while? For example, should I use the first or the second sentence? They don't do this whilst they do that. They don't do this while they do that. Which would be correct?
Answer: The two words 'while' and 'whilst' mean the same thing. They could be considered alternate pronunciations of the same word, similar to among/amongst or further/farther. 'While' came first, and then 'whilst' was derived from it. But they are not used with the same frequency and they give different 'feels'. 'While' is much more common (from Google nGrams) 'Whilst' sounds archaic, affected, or hyperacademic (which means no one in academia uses it). To Americans, 'whilst' sounds British, but at least in print, there is very little difference in the frequencies of the two words between AmE and BrE (via Google nGrams) In the end, it is correct grammar to use them interchangeably, but it is bad style...uh sorry, not the current fashion to use 'whilst'. No one (at least not in formal writing, like for newspapers or academic writing) uses 'whilst' anymore. It may be common and accepted in certain varieties of English (say Indian English) but is very jarring in standard English. However, in the 18th century the two were on more equal terms. The classic study of text analysis by Mosteller and Wallace to help discover the authorship of the Federalist papers was based primarily on the use of differentiating pairs like this.
Example Output: no

Example Input: Question: I understand the capitalization rule for nouns, proper nouns require a capital letter. Also, I should begin a new sentence with a capital letter. When & why "mom/dad" requires a capital letter ? (Reference- ELL- I am at Vapi where mom is hospitalised) mom: (n) informal term for a mother/North American term for mum.
Answer: When it is their name, Mom and Dad would be capitalised: Dear Mom and Dad, I am just writing to let you know, that although everyone has a mom and a >dad, you are my special mom and dad. So, Mom, I just want to say 'brava!'; and Dad, 'bravo!'. I've just been telling Sis, that Mom's new coat is so cool. XX Here's the commentary from an exercise from BBC English on Line ...to have a roast chicken lunch with my mother. I can't wait! - mother does not need a capital 'M' as it is not being used to replace her name. If I said, "I am going to lunch with Mum", it would need a capital letter, but "I am going to lunch with my mum" does not.
Example Output:
yes