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.

Input: Consider Input: 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.

Output: yes


Input: Consider Input: Question: A knife has a handle and a blade. A spoon has a handle and a... Bowl? A fork has a handle and... Spikes? Prongs? I guess this can be extended to more esoteric cutlery such as sporks. 
Answer: Bowl: the hollow of a spoon (M-W) (visualdictionaryonline.com).

Output: no


Input: Consider Input: Question: Ok, if I say "this car is too expensive" or "this car is very expensive", then I can not express the connotation of "expensive". However, if I say "this car is damn expensive" then I better convey the connotation of "expensive". So my question is: What is the English idiom about "expensive" that expresses the idea that "It is so expensive that you feel like you got ripped-off and/or overcharged and/or unmeaningfully expensive"? For example, "damn expensive" could be ok but is there any other term? 
Answer: stiff v. Usually applied to describe "to fail or refuse to tip a server," to stiff also means more generally "to cheat someone out of money." e.g. You said your brother-in-law would give me a fair deal, so I was surprised that he would stiff me out of so much money.


Output: no