Unit 4:           The tipping point
        It is the critical point in an evolving situation that leads to a new and irreversible development: I profile my life on Facebook, Twitter, and Whatsapp. There are many different ways to profile our lives. The best movies are known by generating word of mouth epidemics. Students' energy is consumed by reading books. Professors have ability to win us over, get a hold of  ideas, students can finally make it go a long way.