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A know-all or know-it-all is a person who behaves as if he or she knows everything. Now listen up, no one knows everything, regardless of world renowned professors and intellectuals. Oh! yes, even you personally you don't know everything and you will never know everything, no matter your level of education or qualification. Thus, disregard whatever you think you know presently and then humble yourself in order to learn something new from someone else or others. ~Emeasoba George