Have you ever have a dream you were so sure was real? The simulation argument challenges our very notions of reality by asking whether everything we perceive is nothing more than an elaborate computer simulation. Recently, we've even seen headlines like "one in a billion" probability that we live in the real world. Could this be right? How does this affect how we think about our lives? And are there any counter-arguments to save us? New research from the Cool Worlds Lab resolves. You can now support our research program and the Cool Worlds Lab at Columbia University: https://www.coolworldslab.com/support Thank-you to Kevin Clark, Tom Widdowson, Denny Smith, Stephanie Hackley, Mark Sloan, Laura Sanborn, Kolos Kantor, Patrick Herman, Abel Aganbegyan, Claudio Bottaccini, Daniel Brunk, Douglas Daughaday, Scott Fincher, James Kindred, Andrew Jones, Jason Allen, Steven Baldwin, Jason Black, Stuart Brownlee, Shivam Chaturvedi, David Denholm, Tim Dorais, Glen Downton, Eneko Urrestarazu, Gordon Fulton, Sean Griffiths, Peter Halloran, John Jurcevic, Niklas Kildal, Jack Kobernick, Wes Kobernick, Valeri Kremer, Marc Lijoi, Sheri Loftin, Branden Loizides, Anatoliy Maslyanchuk, Blair Matson, Ocean Mcintyre, Laini Mitchell, Jeffrey Needle, André Pelletier, Juan Rivillas, Bret Robinson, Zenith Star, Lauren Steely, Ernest Stefan-Matyus, Mark Steven, Elena West, Barrett York, Tristan Zajonc, Preetumsingh Gowd, Shaun Kelsey, Chuck Wolfred, David Vennel, Emre Dessoi, Fahid Naeem, Francisco Rebolledo, Hauke Laging, James Falls, Jon Adams, Michael Gremillion, Pierce Rutherford, Trev Kline, Tristan Leger, Lasse Skov & Takashi Hanai. ::Our new paper upon which this video is based:: ► Kipping, David (2020), "A Bayesian Approach to the SImulation Argument", Universe, 6, 109: https://dx.doi.org/10.3390/universe6080109 ::Other references used:: ► Bostrom, Nick (2003), "Are You Living in a Computer Simulation?", Philosophical Quarterly, 53, 243: https://doi.org/10.1111/1467-9213.0