Dunbar's Number THE MISCONCEPTION: There is a Rolodex in your mind with the names and faces of everyone you've ever known. THE TRUTH: You can maintain relationships and keep up with only around 150 people at once. - David McRaney - You Are Not So Smart: Why You Have Too Many Friends on Facebook, Why Your Memory Is Mostly Fiction, and 46 Other Ways You're Deluding Yourself - QuotesSweet