Getty • Below, check each of the details you're absolutely sure you know about your significant other. At the end, you'll get a score out of 50. • Share your score with your partner, 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 to you both. • (And feel free to challenge your significant other on the details they claim to know about you!) Ready? Let's go.