New biological functions do not evolve. But slightly modified functions do push the fitness up.
Well how many slight changes does it take before the function is "new" as compared to the original starting point?
That would still not make natural selection select for the evolution of new biological functions, because the fit ones that do get selected are not selected in a way to produce new biological functions.
Nope. I don't get it. If a modification of "function" results in increased "fitness" why will this change not permeate the population in time?
Natural selection only searches those who are more fit than others, without trying to select for evolution of new functions.
If "functions" increase "fitness" then I fail to see how natural selection would not promote both?
I am limiting myself to your terminology here.
Edited by Straggler, : No reason given.