Re: The first postulate is a truism.

On Fri, 20 Jun 2025 9:06:49 +0000, Mikko 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
/ˈtrˌizƏm/  n. a statement that is obviously true and says nothing new
or interesting. —truistic/trˈistik/ 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.

Your reply does not explain how it is not obviously true and nothing new
that wasn't already known long before Einstein.