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.

Q: 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.".

A: no
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Q: Question: There is a joke: Q: What is grey and comes in quarts? A: An elephant. Why? Why does it come in quarts? What is funny here? 
Answer: I feel like I'm walking into some kind of trolling here, but I believe the joke is based around the definition of "comes" which is synomymous with "ejaculates". In other words, the joke is implying that volume of the elephant's ejaculate is rather large: a "quart" of course being another word for a quarter of a gallon, aka two pints. The first-glance reading of "comes in quarts" would be "is available in quarts" (like milk), and the reversal of the understood meaning of "comes" is where the humour arises (if it does arise).

A: yes
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Q: Question: Which one should I prefer? Is it worth it? or Does it worth it? Additionally, is the following form (without it) correct? Is it worth? 
Answer: Which one should I prefer? Is it worth it? or Does it worth it? "Is it worth it?" is correct. Additionally, is the following form (without it) correct? Is it worth? No, that's wrong, worth always needs another word, like "worth twenty pounds" or something.

A:
yes
****