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At best, we can state that light travels at so and such speed at present, and may or may not have traveled as such in times past, due to many unforeseen contingencies. In fact, there may be just as many unforeseen contingencies that are manipulating the light at present (gravity for one). And, we must not forget that our extrapolations of light emanated from a distance (which we have in no way traversed ourselves) is highly dependent upon not only which cosmological model we place upon the universe, but is also dependent upon whatever factors we are in ignorance of at the moment (the universe is a rather large playground for data points; how many do we *actually* have at present?) 4/21/2004 2:59:32 PM  

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