The Library of Congress has long catalogued great works of art -- think films and books -- but it recently started doing the same thing to each and every tweet ever sent (neither great nor arty). As a newly minted 'Silicon Valley' star, stand-up comedian and Twitter hero in his own right, Kumail Nanjiani finds this appropriately hilarious, but he also sees some potential problems with it.

Like, what if you can't tell great literature and just iffy tweets apart? Not to worry, he's ready to administer an easy quiz on the matter, and last night on 'Conan,' host Conan O'Brien tried his hand at telling the difference.

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