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.

[EX Q]: Question: What did "Four-F." mean in the United States of the 1940s? Here is the quote from Catch-22: They had to send a guy from the draft board around to look me over. I was Four-F. I had examined myself pretty thoroughly and discovered that I was unfit for military service 
Answer: It's a classification for military service. 4-F means "Registrant not acceptable for military service.". The context clue here you might have used to deduce an area of inquiry would be the reference to a "draft board", which is part of the Selective Service System that determines the eligibility and thus the classification of potential draftees.
[EX A]: yes

[EX Q]: Question: is it 'a usual' or 'an usual'? 'A usual' sounds more correct in my head ('Today was a usual day.') than 'an usual', but u is a vowel. Which one is correct and why? 
Answer: The technical definitions are: open vowel sounds or closed vowel sounds. All open vowel sounds such as, orange, envelope and image require the article "an" to bridge the two open sounds. Closed vowel sounds typically start with an unwritten "yu" consonant such as "a university" or "a united Europe, a Europe which is united" and therefore use the more common "a" article.
[EX A]: no

[EX Q]: Question: Today, I received a folder of Recruiting candidate CVs from one of our HR. In this folder, there is a sub-folder named "pass". Question is does this "pass" mean the CVs inside are OK or not OK? If I want to mean the CVs in the folder that are not OK, what exact word should I use? 
Answer: It's ambiguous. It could mean "these candidates passed our tests". Or it could mean "We'll pass on these candidates" (not give them offers). You should ask whoever gave you the folders what the labels mean.
[EX A]:
yes