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: Is the word "dude" becoming gender neutral? I don't think so, however, has modern usage changed? Are there some recent examples of "dude" being used to refer to a woman or group of women? 
Answer: It is common in my experience (woman in US, 26, liberal hippie type) for groups of women to be called "dudes" or "guys" by both men and other women, but not for individual women to be called a "dude" or a "guy." One exception seems to be in greetings using "dude," as in, "Hey dude!".
[EX A]: yes

[EX Q]: Question: A simple question that has sparked some debate, and I couldn't find a concrete answer anywhere. There seems to be two camps: The word plethora indicates plural, so therefore it should be "There are a plethora"; and the other camp says that there is only one plethora (which contains multiple), so it should be "There is a plethora". I've seen many examples of both. Is there a consensus, or is it just one of those things that can go either way? 
Answer: A plethora is singular, so one must say "there is a plethora of..." just as one would say "there is a bunch..." If you are dealing in several plethoras, you could use the plural: "there are plethoras of..." but this feels very contrived and artificial.
[EX A]: yes

[EX Q]: Question: What is the antonym of the word destination. Here is some context: Every train has a destination and a ____? I was thinking it might be origin but I've never encountered that word used in this context so I'm not sure - there might be a better word. 
Answer: According to a Google search, the word origin is used as the opposite of destination on several pages on the Amtrak web site. Amtrak is the largest train operator in the United States. Here are a few examples: This schedule lists the Origin and "Destination" of various routes. The Interactive Route Atlas page says the following: Once you have selected origin and destination stations by one of the methods above, click on the 'Go' button to send your custom route request. The Multi-Ride Ten-Ride Ticket page says the following: Ten-ride tickets are valid for ten rides within a 45-day, 60-day or 180-day period depending on your origin and destination cities.
[EX A]:
yes