Well Bill, since as you say it is unlikely that I'd want to challenge *you* on the subject of gamma correction unless I had evidence it is clearly necessary to provide such. Maybe your just having a bad day so given your rather defensive response in regards to my statement of significant differences between Gamma Correction 1.0 and Gamma Correction 0.0 I will not waste your time making you guess which is which. I will simply tell you the answer and let others see for themselves that 1.0 is not equal to 0.0, all theory aside. 

Three back to back render images, gamma correction off=0.0, gamma correction 1.0 and gamma correction 2.2. No other changes in render or material room between renders. Render window to follow.

Can you people honestly not see a significant difference between 0.0 and 1.0 even in this much reduced upload? And please don't tell me it's random fluctuation. It isn't. It happens agains and again but I will not waste my time showing you a dozen renders to prove it.