Not part of the original thread, I’ll also point to this beautiful example of an IC1 system evolving.
https://www.sciencedirect.com/science/article/pii/S0962892400889667
An amoeba and a bacteria live fine apart. Then the bacteria infects the amoebae. Then the two lose the ability to live apart. Take away the bacteria, the amoeba dies. Take away the amoeba, the bacteria dies. This is, by definition, an IC1 system. It is very easy to evolve. The basic pattern for increasing complexity is.
- Start with something.
- Add something new.
- Make the new thing necessary.
“Add something, make it necessary.”
http://www.talkorigins.org/faqs/comdesc/ICsilly.html
This easily builds up IC1 complexity by obvious mechanisms that most ID proponents would pejoratively call destructive evolution as if that ends the argument. Yet…
So that means that destructive evolution (what ever that is) can, apparently, evolve ever increasing amounts of IC1 complexity.