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: 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: Usual (pronounced /ju.u.l/ as in you) begins with a consonant sound and, as such, it should be preceded by a not an. As an aside, I cannot help but point out that the sentence Today was a usual day is not usually heard in regular conversation. Today was an unusual day is what one might hear, instead! Indeed, I rarely hear the construction a usual. The definite article is more commonly used, in my experience: That's the usual thing. In place of a usual, one would also be more likely to hear not an unusual: Today was a usual day / Today was not an unusual day This is a usual occurrence / This is not an unusal occurrence or This usually happens You are right in saying that a usual sounds weird. As speakers, we tend to avoid constructions which, though correct, do not flow easily from the mouth. In sum, the following are valid and commonly used alternatives: not [an] unusual the usual usually.
Example Output: yes

Example Input: Question: What is the history of the word "troubleshoot"? At face value, it seems to be mean "aiming for trouble." Which must be short-hand for locating the source of the trouble by reproducing it under different circumstances. How did the term come to be? Who were the first "troubleshooters"?
Answer: Why would anyone not see an original link to guns in the term? The logic would flow from issues in the old American West which was, for the most part, lawless. In those days, if a rancher or farmer had trouble with wild animals attacking his livelihood, his first recourse would be to shoot the offending animal. If claim jumpers were bothering (troubling) miners, they got shot. If some patron caused trouble in a bar, he got shot. Even the Indians of the day were prone to pull down telegraph wires that the White Man put up across their territory. Doing so made them troublemakers that required troubleshooters to balance the scales. This begs the answer that the term evolved to describe telegraph repair that would require firepower to back it up.
Example Output: no

Example Input: Question: There is a question titled "Does calling a road 'wavy' convey its shape clearly?" which looks like this is a duplicate, but in fact, it's not. In that question, there's talk of a road that slightly bends right and left, not up and down. So how do you describe a road that is up down and road? I am confused which word to use. There is one word to describe it. Can I say it is a zig-zag road?
Answer: "Undulate" is often used for roads that go up and down, while 'zig-zag' is used for roads that repeatedly bend to the left and right. The road undulates for three miles before descending into a valley. I enjoy an undulating road while driving, but not while cycling.
Example Output:
yes