Generate the answer for a given question. The question requires common knowledge of English. Make sure that the answer is in detail, long, consistent with the context, and requires general knowledge of English. To be less repetitive, please vary your language for each question. Give a proper explanation to answer, and if necessary, provide the definition of various terms. And conclude your answer if it's long. If you have used other resources (e.g., Merriam Webster's.) to answer the question, include citations in your answer. You don't need to paraphrase the context of your resources, but make sure that your answer is consistent and complete.

I believe there is a term for a person who uses 'expert sounding' terminology and exudes confidence, even when their actual abilities are significantly short of their 'presentation'. Using 'wine' a subject.... if a person described a taste as: Magnificent bouquet, the esters resonate with hints of mulberry and asparagus. This must be an oak-matured red from Bordeaux. Perhaps.... 2003 vintage, that was a year when unusual rainfall produced an outstanding crop that had the same rich tannins. A person describing the wine like that has apparent confidence, apparent technical expertise, and so on. Yet, if he was a fraud, and knew nothing about wines, and the 'wine' was really vinegar.... what would you call that person? Additionally, this would not be a one-off thing. This would be a person who consistently 'bamboozles' people, and only when you dig below the posturing, or put them in the company of a 'real' expert, do you see the reality. A fraud, a cheat, an imposter. Those would be true, but I'm sure there's a word which also covers the confidence, charisma, and presentation style too. I just can't think of it.
My first thought for this would be charlatan:- A person who makes elaborate, fraudulent, and often voluble claims to skill or knowledge; a quack or fraud. [American Heritage Dictionary via The Free Dictionary] Another possibility would be mountebank:- a boastful unscrupulous pretender [Merriam-Webster]

There is a person in my current daily life who never admits his wrongs. He is always quick to blame others first and always believes that he is not wrong. Even when he is proven wrong, he still believes he shouldn't be sorry and isn't wrong. Is there a single-word adjective to describe this behavior? If not, a better way to describe this person would also make do. While stubborn and irresponsible fit, I feel like they don't tell the whole story. By this, I mean if I were to say to others that he is very stubborn and irresponsible, it is not implicitly implied that he blames others and never acknowledges his own fault. Edit: I believe my question is different because the person will also never acknowledge their wrongdoing. On top of blaming others, even after it has been proven to be their fault, they will not admit wrong doing. So aside from blaming others, they refuse to acknowledge the possibility that they have committed a mistake.
Sounds like a remorseless/unrepentant person. ODO: remorseless ADJECTIVE 1 Without regret or guilt. 'We're given to understand that because Charlie is tormented by guilt that he somehow occupies a higher rung on the moral ladder than his unrepentant, remorseless elder brother.' unrepentant ADJECTIVE Showing no regret for one's wrongdoings. 'he was unrepentant and said that his comments were completely accurate'

Sometimes I would like to use the word 'inappropriate' when it simply means not quite appropriate, but it usually seems to have the connotation of extremely not appropriate. For instance, if I wanted to say a person was touching inappropriately, it might not mean they are doing something lewd (e.g. touching private parts), but rather, sitting too close and touching in a professional environment where it doesn't make much sense. Or perhaps it's a meeting where a subordinate is dominating a conversation where multiple higher-ups or people more familiar with the topic should be speaking more. Their speech would not be appropriate, but calling it inappropriate seems to indicate that they were making crass jokes or saying something offensive.

I think the problem here is that the word 'inappropriate' has acquired certain connotations. As the question says, particularly in a US business context, it has come to mean something heading towards sexual harassment. However, I don't think not appropriate has these connotations. Alternatively, just avoid the moral judgement implicit in discussing the appropriateness of the behaviour. If, for example, you describe somebody's behaviour as unnecessary or excessive ('sitting unnecessarily/excessively close', 'taking up an excessive amount of time at the meeting'), the reader can figure out that the person wasn't behaving in an appropriate way.