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: It is quite easy to separate preferences, and configuration, but options, and settings have much similar meaning; So similar,in fact, that I can't pick one over another. Could you please describe the meaning of these two words? What is it common between them, and what is it different? I have removed "software UI" from the title, as it seems to lead answers off topic. I'm genuinely interested in subtle difference in meaning of named words. 
Answer: Options refers to things you may choose;you may select one over another. So, the options you chose are "preferences". Settings mostly implies the "context" that the options you chose are in and is more like configuration. E.g; Color is "setting"; red, green, blue e.t.c are options. Font is "setting"; Arial, Times New roman are options. Settings: color, font.

Output: yes


Input: Consider Input: Question: Does the letter 'C' make any sound that cannot be made by other letters? "Cat" could be spelled "Kat," "Cinder" could be spelled "Sinder," and "Watch" could be spelled "Watsh." Edit: An excerpt from a comment by Kosmonaut: There is no difference between ["ch" and "tch"]; both are /t/. Thus, "witch" and "which" are pronounced exactly the same: [wt]. (Actually some Southern American dialects pronounce "which" as [t], but that is only a difference in the "w" sound, not the /t/.) 
Answer: You've answered youself. Ch creates - among other pronunciations of this digraph - the sound tsh' which cannot be created otherwise. Like cheese, China and lots of other words. Sometimes it's used with t before, like in watch, scotch thus putting more stress on the t part of the sound.

Output: no


Input: Consider Input: Question: Possible Duplicate: "Did it close" vs "Has it closed"? As a English non-native speaker it is difficult for me to understand when I must use present perfect or past simple because in my official language there isn't the present perfect tense. I know that present perfect is related to something that happened in the past but its result is important now. But for instance: The message has been sent. The message was sent. Please help me point me out any examples/contexts where I should use 1. instead of 2. 
Answer: 1 means that the action happened just now. You would typically see it in your e-mail program just after you send an e-mail. Your program might give you this message to let you know that the message you just sent has indeed been sent. 2 refers to something that happened at some time in the past. It could have been an hour ago, a day ago, or even a century ago! But it wasn't just now.


Output: yes