Re: Sync two clocks

Le 20/08/2024 à 18:38, Maciej Wozniak a écrit :

W dniu 20.08.2024 o 18:22, Python pisze:

Le 20/08/2024 à 18:18, M.D. Richard "Hachel" Lengrand a écrit :

Le 20/08/2024 à 17:32, Python a écrit :
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In short, for A, tB and tA' are simultaneous.
I repeat, for A, tB and tA' are simultaneous.

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Numbers like t_B or t'_A cannot be "simultaneous". Events
like e1 = "B sends back a light signal to A" or e2 = "A receives
this signal" can be.
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If this is what you meant, which is likely, then, according
to Einstein-Poincaré *definition* of simultaneity:
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e1 and e2 are NOT simultaneous for A (nor for B)

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No.

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According to Einstein-Poincaré definition of simultaneity
they are not simultaneous.
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However you like or not this *definition* this is something
you CANNOT deny.
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A definition cannot be false.

 If your idiot guru defined a cow as a 6 leg
small animal with chitine armour - would it
be "not false" to you as well, poor halfbrain?
 

Who knows? If you were in an "everything goes" day it would not be
false.
But if are in a "nothing goes" day, nothing is not false, even
defining a cow as a four legs mammal usually grown in farms is
false.