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: Question: What's the difference between the following examples: Neither of my teachers are mathematicians. None of my teachers are mathematicians. 
Answer: Neither - not either - implies that there is a choice of only two. So 'neither of my teachers' is only correct if there are exactly two teachers, 'none of my teachers' can be any number.
Example solution: yes
Example explanation: The answer is well in context with the question and gives a proper explanation to resolve it. Hence, the output "yes" is correct.

Problem: Question: I am looking for a word or phrase which can be used in the sentence: It is a rather old, but _________________ technology. The word or phrase should address a technology that is totally investigated, researched in detail, and thoroughly optimised, so there is nothing more to find out or improve. 
Answer: I don't know of a technology that cannot be improved, but we often use the term mature to describe technology that's deemed developed enough to be left alone: A mature technology is a technology that has been in use for long enough that most of its initial faults and inherent problems have been removed or reduced by further development. In some contexts, it may also refer to technology that has not seen widespread use, but whose scientific background is well understood. Wikipedia mature 6. No longer subject to great expansion or development. Used of an industry, market, or product. American Heritage® Dictionary.

Solution: yes