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From: Mikko <mikko.levanto@iki.fi>
Newsgroups: sci.physics.relativity
Subject: Re: The first postulate is a truism.
Date: Mon, 23 Jun 2025 11:43:48 +0300
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On 2025-06-22 11:25:52 +0000, J. J. Lodder said:

> Mikko <mikko.levanto@iki.fi> wrote:
> 
>> On 2025-06-19 17:37:29 +0000, LaurenceClarkCrossen said:
>> 
>>> Perplexity:
>>> 
>>> "The First Postulate of Special Relativity
>>> 
>>> Statement of the First Postulate
>>> 
>>> The first postulate of special relativity, also known as the principle
>>> of relativity, states:
>>> 
>>> The laws of physics are the same in all inertial frames of
>>> reference."
>>> 
>>> 
>>> "truism
>>> /?tr?iz?m/  n. a statement that is obviously true and says nothing new
>>> or interesting. —truistic/tr?istik/ adj." -Oxford American.
>> 
>> The first postulate is not a truism. It is possible to imagine a world
>> where it is not true and to believe that we actually live in a such
>> world.
> 
> Applying 'truism' to postulate is a category error anyway,
> (but what do we expect from dear Laurence?)

I think the (mistaken) idea was that if it is a truism it is wrong
to call it a postulate.

-- 
Mikko