Female, male, undefined? Black, white, of color, European, Christian, atheist? with education, without one? with a degree, without one? French, English, Slang, Spanish, German, Korean, Russian speakers? Feminine, masculine? Below 59, below 20, generation X, generation Y, generation Alpha? Yes, there are categories, all of them are categories and that’ s okay. To open a box, you first need to know it’s actually a box, and then you can shake it open, as often as you want.