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:
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Perplexity:
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"The First Postulate of Special Relativity
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Statement of the First Postulate
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The first postulate of special relativity, also known as the principle
of relativity, states:
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    The laws of physics are the same in all inertial frames of
reference."
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"truism
/ˈtrˌizƏm/  n. a statement that is obviously true and says nothing new
or interesting. —truistic/trˈistik/ adj." -Oxford American.

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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.

How is stating something already known and accepted any basis of a new
theory?