Parmy and Alex are joined by Forbes tech writer Kathleen Chaykowski to discuss how companies and consumers are combating the proliferation of fake news. Alex Knapp talks to UCLA professors Timothy Tangherlini and Vwani Roychowdhury about a machine learning method they have developed to identify fake social media stories. Parmy Olson interviews author and neuroscientist David Levitin about using critical thinking to vet news sources.