Some past threads:

How to Build a Universe That Doesn't Fall Apart Two Days Later, Philip K. Dick - https://news.ycombinator.com/item?id=23500469 - June 2020 (117 comments)

How to Build a Universe That Doesn't Fall Apart Two Days Later (1978) - https://news.ycombinator.com/item?id=20207585 - June 2019 (19 comments)

How to Build a Universe That Doesn't Fall Apart Two Days Later (1978) - https://news.ycombinator.com/item?id=9943609 - July 2015 (12 comments)

How to Build a Universe That Doesn't Fall Apart Two Days Later by Philip K. Dick, 1978 - https://news.ycombinator.com/item?id=451981 - Jan 2009 (3 comments)