We have all dealt with the Blowhard Know-It-All types that think they know everything and are smarter than everyone else. Is this a sign they really don't know much but try to fake it, or are they arrogant? I have seen both and perhaps it just depends on the individual person but I wanted to get other's perspective on these types.
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Great insight. I like Sherlock Holmes because he respects people and doesn't think he's better than everyone else. The other type you mention -- yep those are the ones the watch out for!