Some time ago there was a thread which suggested that there was a logic / papers that demonstrated why the the CMBR could not be the result of ligh from background objects / galaxies. Unfortunately, I have not been able to locate the thread or associated material. Is this correct, and could anyone give me references to related material? (I apprecialte that I am not / unlikely talking about light or resibual light from visible galaxies.) Regards, Noel.