Today on the Gist, the case for integrating math into everyday conversation. Mike talks with Jordan Ellenberg, author of How Not to Be Wrong. Then, a look at a hostile takeover attempt that harkens back to days of Barbarians at the Gate. Jeffrey McCracken from Bloomberg explains how the drug company Valeant is attempting to buy Botox-maker Allergan with the help of an activist investor. Plus, Mike's Spiel honors Massimo Vignelli, the late graphic designer best known for laying out the NYC subway map.Get The Gist by email as soon as it’s available: slate.com/GistEmailSubscribe to the podcast in iTunes: https://itunes.apple.com/us/podcast/slates-the-gist/id873667927?mt=2Learn more about your ad choices. Visit megaphone.fm/adchoices