I quoted a Stanford University website that provided information on the currently accepted theory of particle physics. It isn't what one scientist "thinks" it is what is accepted by the overwhelming preponderance of professionals trained in this field.
Chuck Missler, Ph.D, B.A. all that good stuff in astrophysics says light does decay in speed and your guy only said that "as far as he can tell."
That's an interesting misquote of what I posted. The remark about "as far as he can tell" was with respect to the stability of the proton (as there is a theoretical possibility that it could be unstable, but with an incredibly long half-life.) The remark had nothing to do with the speed of light. The fact remains that if any of the nuclear particles I listed were unstable and decayed, you could get yourself a Nobel prize if you had evidence of it happening. Where is it? There is none; hence, my refutation of your assertion that everything decays still stands. Thus, you have no scientific basis for asserting the speed of light decays.
As for your claim that the speed of light has been measured to be slowing down, scientists can't seem to find the data that you claim supports this claim. Selective use of data, especially error prone measurements made hundreds of years ago, hardly constitutes proof that the speed of light is slowing down.
Now, as to your expert who you claim says that light speed decays, would you please post exactly what his degrees are, and a link to where we can verify them. He sounds very interesting. I look forward to scrutinizing his credentials.