Naturalism

icamewithasword said:

Short answer; No, I have not. But that was exactly my point. How can you (or someone else) make an absolute statement like 'the speed of light is constant' as in it's the same now as from the begining of its creation, unless you hold a claim to the same omniscience as God?
You are making an 'assumption' without any proof. And the only way you could prove this was to have been there from the beginning.

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Um... we make that claim based on the very fabric of the universe. For the speed of light to not be constant, then the permeability and the permittivity of space would have to change, which would affect the world on a very fundamental/electrical level, which would change the very nature of atoms and molecules. Maybe it could change slightly without destroying matter, but any big change is going to have effects that are likely horrific.