Being rational all the time isn't going to do you any favors — Quartz

Being rational all the time isn't going to do you any favors — Quartz: In 2012, Facebook bought the 13-person photo-sharing app Instagram. Six years later, it seems safe to say it was the company's smartest purchase ever, with the app now estimated to be worth $100 billion. It's a staggering 100-fold return on the original $1 billion purchase, especially considering its next high-profile social media acquisition, WhatsApp, cost Facebook $19...