Given the task definition and input, reply with output. 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]