Epistemology is the study of how we know what we know - the theory of knowledge. But in the 21st century the objective basis of knowledge has been challenged as never before. In this FRDH special, Baroness Greenfield, Oxofrd University neuroscientist talks to FRDH hos Michael Goldfarb about 21st century epistemology. How can people recognize what is factual truth when bombarded all day long by online falsehoods that seem like facts? What happens when the usual processes by which learning take place are amped up and corrupted by a million lies a minute on Twitter?

Take 23 minutes to find out.