OkCupid is a free-of-charge social networking and dating website, which also offers features including user-generated content such as blogging and member-created quizzes.
OkCupid users are presented with questions (most of which are authored, submitted, and vetted by members) about various topics such as politics and tastes page by page, and given a list of up to four answers per question to choose from. They are also asked "How would your Ideal Match answer this question?", and then "How important is their answer to you?", with degrees of importance for the latter listed as "irrelevant", "a little important", "somewhat important", "very important", and "mandatory", each respectively assigned a greater numerical value. The site uses the numerical values to calculate "friend", "enemy", and "match" percentages between any two members of the site based on how many answered questions those two users have in common (referred to as their "intersection"), with higher intersections supposedly producing more accurate percentages.
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