Mike, your questioning our knowledge of the true speed of light prompted me to look back through my notes and unearth the following:

"....when we claim that the speed of light is well known, what we are really saying is that we know the speed of light relative to any observer, and since we have already established that such an observer can be travelling at any speed, or in any direction relative to the light, at the time of making the observation, then we must ask ourselves how well, in truth, we know the actual speed of light. Of course, if we are thinking relativistically, we also have to ask ourselves if talking about the actual speed of light is in any way meaningful.

There never was nothing.