Your original statement (reply # 69) was:
But since all things in a closed system tend toward entropy, that includes light.
Thus, you have argued that entropy, by which I presume you mean the Second Law of Thermodynamics, requires the speed of light to "deteriorate."
Light is an electromagnetic phenomonon, not a Thermodynamic one. The fact that the closed thermodynamic systems tend to undergo changes that result in an increase in the overall entropy of the system and its environment has nothing to do with electromagnetism, and hence light.
Thus, you have provided an erroneous justification for the putative deterioration in the speed of light.
Let me be clear: I am not restating what you stated; I am repudiating it.