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 Input:
Question: I came upon this letter when reading a book, I couldn't find its name on the internet, you can imagine how hard it is to search about it. What is the name of the letter that follows "sample space"? I know it's not really an English question, but I think this site is best fit for the question than say, the mathematics site.
Answer: It's an S written in a fraktur font used by mathematicians. This one is easy to find out using Detexify.

Ex Output:
yes

Ex Input:
Question: If I were to try to achieve something you could say I "had a go". If I tried it multiple times, how would I write that down? I had many goes or I had many go's or I had many gos
Answer: Not what the OP intended... The noun go (a Japanese board game) has the English plural gos. Perhaps one could even say "I had a go" with this meaning.

Ex Output:
no

Ex Input:
Question: What's the difference between these two phrases?
Answer: To add to Martha's answer: The simple past ("Did you see this") refers about an event in the past The present perfect ("Have you seen this") suggests a link with the present time. If "this" is something you could have seen but cannot anymore (you should have been there seeing "this" at the time, but it wouldn't have the same impact if you see it again now), then "Did you see" is more appropriate. It is about an event that happened once in the past. If "this" is something you can check out whenever you want, "Have you seen" is more to the point, because it suggests that, if you haven't seen it in the past, you could consider seeing it now or in the near future. It is about an event which can happen again or is still relevant in the present.

Ex Output:
yes