A necessary book for our times. But also just great fun Saul Perlmutter Nobel LaureateThe world is awash in bullshit and were drowning in it. Politicians are unconstrained by facts. Science is conducted by press release. Startup culture elevates hype to high art. These days calling bullshit is a noble act.Based on a popular course at the University of Washington Calling Bullshit gives us the tools to see through the obfuscations deliberate and careless that dominate every realm of our lives. In this lively guide biologist Carl Bergstrom and statistician Jevin West show that calling bullshit is crucial to a properly functioning social group whether it be a circle of friends a community of researchers or the citizens of a nation. Through six rules of thumb they help us recognize bullshit whenever and wherever we encounter it even within ourselves and explain it to a crystalloving aunt or casually racist grandfather.