Can't have cell nucleus developed without a cell membrane and cell wall (extremely complex has nine layers and has openings for exits and entrances which do not allow everything to enter) to protect the nucleus and the membrane/wall can't form without something inside. Can't have a brain without thought (by the way what was the first thought? must have been quite an event) and vice versa. The compound eye appeared suddenly in the Cambrian explosion. It came as a package deal. What good is a retina by itself? Or ocular muscles without a lens? Yet, according to Darwin it could not come as a package. If it did, it would violate the very criteria he established for his theory that living structures had to be capable of evolving in small incremental steps. No progression of eye designs from simple to complex has ever been produced in the natural or fossil world.
Atheist Credo: An universe by chance that also just happened to admit the observer by chance.