TASK DEFINITION: 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.
PROBLEM: Question: I sometimes see the term "critical but stable" in the news. It is often used to describe someone who has been very seriously injured. For example (15 December 2019): "[A police officer] said the man who had been shot was in a "critical but stable " condition in hospital." I understand that "critically ill" means that life is in danger. Similarly "stable" is the opposite. Quotes from www.lexico.com critically To an extreme degree with a risk of death. 'two critically wounded people died in hospital'. 'critically ill patients who were awaiting surgery' stable (of a patient or their medical condition) not deteriorating in health after an injury or operation. 'he is now in a stable condition in hospital' What does "critical but stable" really mean? 
Answer: It seems contradictory on the surface, but it really does just combine the definitions you listed. So,the patient's condition is very serious or an extreme degree of injury, but not currently deteriorating or worsening.

SOLUTION: yes

PROBLEM: Question: I want to ask whether I can use the word "Fuck" in a formal context. Apparently, the word dates back to the early 16th century, so it shouldn't be considered slang (although, it is misused as slang for other reasons), but regardless of its vulgarity, could I use it in a formal context with its original definition? I imagine that people will be surprised, but when realizing in what context I am using it in, then it will be more understandable and acceptable to use it. Firstly, I do not even know the definition of the word due to its vastness in meaning, I always thought it was an exclamation-like word meaning nothing (for it to mean sexual activities is a slang definition, is that not correct?), but used purely for emphasis. What does it first and foremost mean in its original/accurate and/or formal definition? I also know of another definition of the word "Fuck," which is "I will fuck you" as in "I will defeat you" (in context of fighting or combat), is that a formal definition as well? I mainly ask for this, because I need to use the word in this context, specifically and especially. Also, side question, is it possible not to always make it a vulgar word? Thanks in advance. 
Answer: Let's just go ahead and say, no. It's questionable to use expletives here, so... unless you're writing a dissertation on the usage of the word in question, again: no. You shouldn't use any word you don't know the definition of, but here at Stack Exchange you may use them to talk about them. They are permissible when they are the context.

SOLUTION: yes

PROBLEM: Question: Possible Duplicate: What is the correct way to pluralize an acronym? What's the plural form of "SMS" (if X), like: I'm concerned, I sent him over a million X but got no response. I usually use text message to get rid of that situation. 
Answer: The common way to pluralize acronyms is to add a lowercase S, so it would be SMSs. But SMS (short message service) is not usually used like that. SMS is the service you use to send text messages. SMS can also be used to talk about a feature-set ("It's got unlimited SMS."), or a technology ("This tablet supports SMS."). Both text (sometimes abbreviated txt) and text message are used. I'm concerned. I sent him over a million texts, but got no response. or I'm concerned. I sent him over a million text messages, but got no response. Google Ngram seems to support this:.

SOLUTION:
yes