When is the truth the truth, a lie a lie, and what constitutes mere BS in an era that many refer to as “post-truth”? This panel addresses the kinds of critical and largely ethical questions we confront in our modern-day discourse, exploring the intent of the First Amendment (does it protect lies?), the reasons we lie (or, in fact, are we just strategically misleading?), and, through the lens of a lawyer, a fact checker, and a scientist, the ways various of us define and “get to” the truth. Panelists include Geoffrey Stone , Larissa MacFarquhar , Fred Dust , Drew Endy , Russell Muirhead , Yudhijit Bhattacharjee , Yvonne Rolzhausen , Jack Rakove and Neal Katyal .