@MoralOfStory 1) Choose a setup for your bizarre event. 2) Run physics backwards in time. 3) You now have initial conditions that create it.
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Replying to @CurlOfGradient
@CurlOfGradient e.g. in GOL there are clearly positions for which there are no t-1s...1 reply 0 retweets 2 likes -
Replying to @MoralOfStory
@MoralOfStory In physics, as long as the position and momenta of every particle are defined e.g. then you can find paths forwards and back.1 reply 0 retweets 0 likes -
Replying to @CurlOfGradient
@CurlOfGradient hmm how certain is this? Citation?1 reply 0 retweets 0 likes -
Replying to @MoralOfStory
@MoralOfStory http://www.nyu.edu/classes/tuckerman/stat.mech/lectures/lecture_3/node2.html … "...from the point of view of mechanics... there is not preferred direction for the flow of time."3 replies 1 retweet 2 likes -
Replying to @CurlOfGradient
@CurlOfGradient will look later. assuming true, you still only get 1 fireball per universe, though...1 reply 0 retweets 1 like -
Replying to @MoralOfStory
@MoralOfStory I'll concede that; making multiple events happen without breaking each other is probably impossible.1 reply 0 retweets 2 likes -
Replying to @CurlOfGradient
@CurlOfGradient if you run an arbitrary universe state backwards, what are the chances it converges on a big bang?1 reply 0 retweets 2 likes -
Replying to @MoralOfStory
@MoralOfStory *mumble mumble gravity mumble rest of the system attracts part I changed mumble*1 reply 0 retweets 2 likes -
Replying to @CurlOfGradient
@MoralOfStory So my proposal only works in toy universes. Good enough.1 reply 0 retweets 1 like
@MoralOfStory Toy universes with reversible laws, unlike game of life which doesn't conserve information, to be specific.
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Replying to @CurlOfGradient
@CurlOfGradient And it takes many bits to specify such a universe, unlike our own, which probably has a low-bit count initial condition?1 reply 0 retweets 0 likes -
Replying to @MoralOfStory
@MoralOfStory Unfortunately our universe has absurdly specific initial conditions.pic.twitter.com/3aK601eLTf
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