Episode description

The best part! If you missed the others, don't miss this one. All four strands come together to explain the possibility of time travel and the intrigue that arises when considering travelling to "your" past or future to visit "yourself".

Rough timestamps follow: 00:00 introduction and the significance of virtual reality 04:03 Physically possible renderings and resolving paradoxes 07:30 what does VR time travel tell us about physics?  11:05 Personhood and time travel  13:30 Highly unlikely events, the multiverse and “never”. 15:45 General Relativity and time travel 18:51 David’s 70th birthday online acknowledgement https://dd70th.weebly.com/ 20:14 Past directed time travel: the consensus 25:25 Black holes, wormholes and time travel 34:10 More on paradoxes and quantum gravity 38:00 The unpredictability of the growth of knowledge . 42:05 Visitors from the future 45:50 Time travel, BoI and Fungibility 56:00 Knowledge Paradoxes? 1:00:40 Creation ex nihilo and “recombination”. 1:06:39 Biological and explanatory knowledge 1:11:32 Useless information and the resolution of knowledge “paradoxes” 1:15:23 The knowledge “crystal” - structure across the multiverse. 1:22:18 The entire biosphere as a computation. 1:26:20 Civilisations as virtual reality renderings. 1:30:00 The four main strands and time travel.