time-reverse

Obviously if you time-reverse the whole universe, the cosmological arrow of time would be flipped along with everything else, and the “time reversal” would have no physical significance whatsoever.

Arrow of Time FAQ Sean 2007

You then time-reverse all of this together, and call it a universe with a white hole.

Arrow of Time FAQ Sean 2007

Obviously if you time-reverse the whole universe, the cosmological arrow of time would be flipped along with everything else, and the “time reversal” would have no physical significance whatsoever.

Arrow of Time FAQ Sean 2007

And if you time-reverse a black hole formed by a collapsing star, then if you let yourself fall freely towards the white hole produced by the reversal, you never cross the horizon; rather, after a finite proper time, you collide with the time-reversed collapsing star emerging from the white hole.

Arrow of Time FAQ Sean 2007

Do you agree that all of the following are compatible with the laws of physics: a solar system with orbits just like ours and entropy increasing, a solar system with orbits just like ours and entropy decreasing, a solar system with orbits that look like the time-reverse of ours and entropy increasing, and finally a solar system with orbits that look like the time-reverse of ours and entropy decreasing?

Arrow of Time FAQ Sean 2007

My statements about the light cones at the horizon were correct as far as they went, but when you have an eternal BH/WH pair like this, what happens when you time-reverse it is the white hole becomes a black hole, and an observer who falls from the exterior falls into what is now the black hole!

Arrow of Time FAQ Sean 2007

You then time-reverse all of this together, and call it a universe with a white hole.

Arrow of Time FAQ Sean 2007

Think of my analogy of a solar system that is the gravitational time-reverse of our own from comment #78.

Arrow of Time FAQ Sean 2007

But wait, yesterday Rumsfeld said there were 200,000 Iraqis, so how did the Iraqi forces fall 50,000 in four days, and in time-reverse?

How many Iraqis are fighting on our side? Steve Sailer 2005

But wait, yesterday Rumsfeld said there were 200,000 Iraqis, so how did the Iraqi forces fall 50,000 in four days, and in time-reverse?

Archive 2005-07-24 Steve Sailer 2005