Getty • Below, check each of the details you're absolutely sure you know about your best friend. At the end, you'll get a score out of 50. • Share your score with your best friend, who will then take the quiz, checking off all the the things they're absolutely sure they know about you. • Whoever has the highest score wins! If there's a tie, congratulations on both being super awesome friends (or at least equally crappy friends). • Feel free to challenge your best friend on the details they claim to know about you! And if you've got more than one best friend, just retake the quiz for each friend you want to test.