@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 so rereading that, doesn't it flat out admit that gravity breaks the reversibility?1 reply 0 retweets 0 likes -
Replying to @MoralOfStory
@MoralOfStory Only "in that the true microscopic origin of the external field is not taken into account". If you run time backwards on a 1/?1 reply 0 retweets 0 likes -
Replying to @CurlOfGradient
@MoralOfStory ball that hits the ground, the ground will sync up to push the ball back into the air, and air molecules will rush in to 1/31 reply 0 retweets 1 like -
Replying to @CurlOfGradient
@MoralOfStory continue pushing the ball back up to its original height. 3/31 reply 0 retweets 0 likes -
Replying to @CurlOfGradient
@MoralOfStory Physics only seems irreversible because of entropy; there are many more ways to go to disordered states than to ordered states2 replies 0 retweets 1 like
@MoralOfStory You're still right about our particular physics for one reason; the weak interaction is not T-symmetric, it's CPT-symmetric.
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