NYU Prof. Ruby Thelot on how to tell a real trend from three TikToks in a trench coat: "This is one of the hardest things to do on the internet. I like to say, is this a real thing, or is this three TikToks and a trench coat? Because oftentimes what feels like a trend, what feels like a novel social behavior, can just be super micro, super small." "What we do at 131 is a lot of quantitative analysis of social media to see how prevalent this thing really is. There's been articles about this…