I had advocated Barry Setterfield’s decaying speed of light model as a possible mechanism for seeing distant starlight on shorter time scales than billions of years. At this time I need to appraise those who have followed my defense of Barry’s theory, that I no longer think Setterfield’s versions of the c-decay are workable as stated. Although we still have potentially anomalous data points in the measurement of the speed of light that could argue for a universal, isotropic decaying speed of light (as reported in Nature), and even though Joao Magueijo, John Barrow, Paul Davies have argued for the possibility that the speed of light was universally faster in the past, I have not been able to resolve difficulties … Continue reading Admitting significant errors in my understanding of physics — speed of light theories