Fallible friend:
"There is no evidence that undirected evolution is impossible."
But atheists say there is no God because of the absence of scientific evidence.
My point was, and is, as in the 4 forces of cosmology, that it is impossible, and there are thousands of examples in biology as well. Maybe, maybe, one process such a renal function could have evolved without direction. But to accept undirected evolution, one must deny the interconnections of organs in the body. No need to expand on this.