My point is that since I(C1:C2|G) is upper limited by I(C1:C2) then when evolutionary biologists measure I(C1:C2|G) as you seem to say they are, they are also measuring a lower bound on I(C1:C2). And if I(C1:C2) cannot come about through naturalistic processes, so any I(C1:C2) > 0 is an indication of intelligent design, then likewise any measurement of I(C1:C2|G) > 0 is an indication of intelligent design. So, I do not understand why your claim that I(C1:C2|G) > 0 can be produced by natural causes undermines ID, if you at the same time agree I(C1:C2) cannot be produced by natural causes. I am very confused.