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Mirrors. "PT-theorem".
We found our first mirror in the 2D world.
(142)
But the image of an image, through a succession of two mirrors, is identical to the initial object:
(143)
The same applies in 3D:
(144)
...We said that 4D structures are comparable to animated holograms. In a way, you and I are animated holograms. We are 4D structures. We are oriented in space (if I recall correctly, the liver is on the right) and in time. We can perceive what is "right," what is "left," what moves from past to future, as well as what moves backward in time.
If you encounter an enantiomorphic human creature, the test is simple: look where its liver is.
...The chronological test is more difficult. But normally, if you talk with an antichronological person, after a while you will notice that:
- He knows everything you are about to say.
- He ignores your previous statements. (If he seems to know everything, he’s God, by definition.) Suppose an animated hologram meets another animated hologram. It can look at it through a regular mirror. It can also look at it through a mirror of time.
See:
[1] : J.P. Petit: Enantiomorphic universes with opposite arrows of time. Comptes Rendus de l'Académie des Sciences de Paris, t.284, série A, 1977, p.1315 (Enantiomorphic universes with opposite time's arrows)
[2] : J.P. Petit: Universes interacting with their image in a mirror of time. Comptes Rendus de l'Académie des Sciences de Paris, t.284, série A, (June 6) 1977, p.1413 (Universes interacting with their image in a time mirror).
Consider the motion of the Moon around Earth:
(145)
Consider the mirror image of this system:
(146)
Then reverse time:
(147)
The motion of the Moon and its PT-symmetric counterpart are identical.
...Physically: Imagine you could film this phenomenon. You sit at a distance and record the Moon's motion around Earth. Then you make a copy of the film. You use two projectors. In the first, you insert the film in its correct orientation. In the second, you flip the film, reversing the spatial orientation of the images:
(148)
Note: this film corresponds to a 3D spacetime (x, y, t). Then, when projecting the images onto a screen, you reverse the chronology of the second sequence of frames.
(149)
God is a giant snail whose peduncular eyes are each connected to half of interacting brains, with inverted biological clocks.
(If you have another definition, send it by email. We will publish it, mentioning the author, of course.)