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.
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Question: Question: E.g. is short for exempli gratia, and is in common use to introduce an example within a sentence. Submit a sample of academic writing, e.g., a dissertation chapter. However, some authors use ex. or ex: (short for "example") for the same purpose, and this form is listed in some authorities like the Wiktionary. Submit a sample of academic writing, ex: a dissertation chapter. I know they both roughly mean "example", but which one should I use, and when? Are there connotations associated with one or the other? This question has been asked elsewhere, and this very answer comes up when you ask Google about the difference. It would be good to get an EL&U answer for it. 
Answer: "Ex." is not very common, but it may be used to refer to a cited example, eg "See ex. 3". "E.g." is much more common, and is used to introduce an example, or series of examples. In speech, it is usually replaced by "for example".

Answer: no


Question: Question: It is common in American English to refer to a powerful person or organization as an 800 pound gorilla. The expression makes sense -- a gorilla of that size would certainly be intimidating -- but what's so special about the number 800? Searching "n lb gorilla" on Google for various values of n results in many more hits when n = 800 than when n is any other quantity. Also, the Google Ngram Viewer finds notable occurrences of the phrase "800 pound gorilla" in texts starting around the late 1970s; other sized gorillas don't seem to be mentioned at all. The Wikipedia entry for the idiom claims that the phrase is rooted in a riddle ("Where does an 800lb gorilla sleep?"), but that's just passing the buck. A 700lb or 900lb gorilla would be equally entitled to sleep wherever he wants to. Interestingly, the Wikipedia entry for gorilla states that the average male gorilla weighs about 400lb, occasionally reaching 500lb in the wild. Only obese gorillas in captivity have attained weights of 600lb. So the number doesn't even seem to be related to gorilla biology (except that it is safely larger than any known gorilla, save King Kong). Given that it's an arbitrary figure, is there any reason the number 800 would be more popular than any other? More generally, is there any relevant research into why some numbers would be more popular or pleasing than other in contexts like this? 
Answer: The answer to your question is No, there is no known reason for preferring 800 to any other number. I am not aware of any research into the question, but I haven't looked. Compare "The whole nine yards", "42", and "A Thousand Nights and a Night".

Answer: no


Question: Question: Which is correct? The thief carried the knife carefully so as not to cut himself. The thief carried the knife carefully not to cut himself. 
Answer: I am not an English major but these answers seem wrong to me. I came here to see if "so as not to" was considered appropriate in any case. The comma makes it sound like the writer is trying to say that the killer was not suicidal and wasn't carrying the knife to intentionally cut himself. This is not what the author means. He means to say that the thief was carrying the knife in a protective manner so that it would not accidentally cut him. I would use, "The thief carried the knife carefully so that he would not cut himself.".

Answer:
no