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No, no, no.


Its not so much the speed of light (which we know to decrease depending on the medium through which light travels) but a sort of cosmic speed limit which coincidentally equals the speed of light travelling in vacuum. This speed limit cannot be breached simply because the field equations are reduced to irrational quantities.


What einstein postulated as a constant c is the speed of light travelling through a constant gravitational metric. And for all intents and purposes, the michelson-morley experiment, (what plc1 is harping about in this thread) does prove a constant c.


But that simply is not the case elsewhere in the universe, especially when one contemplates the cosmological fluid (a continuous fluid where entire galaxies are considered as a mere particle in relative scale).


In fact, that is the whole strategy of vsl. It does not seek to debunk einstein's relativity (which is sacrosanct in its field) but rather define the parameters by which lorentz invariance is violated. The implications are simply astounding. For one thing, it provides the mathematical framework by which a universe expands at an accelerating rate. It is the simplest way by which one understands how the nascent universe could have expanded at a rate of a couple of thousand times the speed of light (as standard inflation suggests but somehow couldn't convincingly prove). And most importantly, it  strikes at the very heart of the principle of conservation of mass and energy. And when one can conceiveably expect that mass and energy are not conserved, then what one is left to logically conclude is simply a process of CREATION -- literally something coming out from nothing.


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