"He always has an answer for everything - he's such a know-it-all."
"She acts like a know-it-all, but she often gets her facts wrong."
"The know-it-all in our group always tries to show off their knowledge."
"I avoid talking to him because he's an annoying know-it-all."
"She is known as the office know-it-all because she has an answer for every problem."
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