"Savoir faire" suggests a certain adaptability to a variety of social situations. The term suggests this comes naturally and is not forced. It is not fake.

Critical thinking is associated with discernment. Perhaps consider the posture of Rodin's statute "The Thinker". Perhaps, the fellow is hard at work "thinking".

Well-dressed might be a part of having "savoir faire"; however, it does not paint the full picture. One not only has to look the part but be the part as well!

"Apathy" or being apathetic is a nice synonym term for not caring about something

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