This this this, the real answer! The truth has always been determined through meaningful social consensus. This doesn’t scale well — you need a diversity of people in your life (eg boss, friends, clients, spouse, local hipsters etc) to build knowledge. People in this thread are trying to synthesize a folk epistemology when in reality knowledge of facts is also a lived-in fat just as know how is.

Watch the documentary “Being in the world” for more.