On 1/8/2014 4:11 PM, LizR wrote:

On 9 January 2014 07:58, John Clark <johnkcl...@gmail.com <mailto:johnkcl...@gmail.com>>wrote:## Advertising

On Tue, Jan 7, 2014 at 2:59 PM, Jesse Mazer <laserma...@gmail.com <mailto:laserma...@gmail.com>> wrote: > Well, most physicists already agrees physics is time-symmetric I think you would have enormous difficulty finding one single physicist on the face of the earth who says time is symmetrical.... well OK,... maybe a physicist who just hag a stroke. You could find many that think Quantum Mechanics states time is symmetrical, or almost symmetrical. So much the worse for Quantum Mechanics.The equations of Newtonian dynamics are time-symmetric, similarly for relativity (bothSR and GR - even gravitational collapse is reversible according to the equations) - andquantum mechanics is, too. The only thing in the entirety f physics that isn't based ontime symmetric equations is thermodynamics, which most physicists agree is an emergentphenomenon, due to a special initial arrangement of the components of the universecoupled with the likelihood that they will come to occupy more probable states over time..The second law of thermodynamics is based on the argument that a system in a low entropy(i.e. improbable) state will head towards a high entropy (i.e. more probable) statethrough the statistical result of random movements, because there are by definition farmore probable states than improbable ones. This assumes the dynamical interactionsinvolved are time-symmetric, since otherwise there would be no need for this argument -the universe would head that way for some other reason, due to some built-in timeasymmetry. Since there is no such known time asymmetry, thermodynamics relies on astatistical argument and an improbable initial state. This was all explained byBoltzmann about 140 years ago.

`Look up Schulman's "special state" theory of QM. He uses the time symmetry and a`

`requirement that there be no "grotesque" states (superposition of macroscopic systems) to`

`explain the appearance of randomness in QM.`

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