We keep talking at cross-purposes. I'm going to try to explain my POV more thoroughly.
1. The atheist/darwinian believes there is no God, and, therefore, no Creator. Therefore, the universe is uncreated, undesigned, and utterly devoid of purpose from an intelligent agent, (and most certainly without "intelligent design").
It just "is". Dead. Lifeless. Mindless. Undirected.
2. Now, my understanding of the word "purpose" is that it always entails intent, and entails intelligence, and, purpose in, almost every case, results in design of some sort. "My purpose in writing...", "the purpose of this paper...", etc. About the only exception to the design principle I can think of would be abstract art, where the "purpose" might be to show the disorder and meaningless of life, where there is a nihilistic intent (and this activity is driven by 20th cc. atheistic existentialism, BTW).
Let's look at some dictionary defs of "purpose" and see if I'm on the right track:
Purpose:
1. the
reason for which something exists or is done, made, used, etc.
2. an
intended or
desired result; end; aim; goal.
3. The object toward which one strives or for which something exists; an
aim or a
goal:
4. A result or effect that is intended or desired; an
intention.
5.
Determination;
resolution.
I think I'm on the right track so far.
In a darwinian/atheistic universe, there is no "reason" for the universe (and all that's in it, all subsets of it); there was no intended or desired result in its cause (if it has one), no end, no aim, no goal, no object towards which it is striving or for which the universe (and everything in it) exists, no result or effect intended or desired, and, since there is no conscious, intelligent being behind the universe, no determination or resolution.
It just "is".
3. Now, what can be said of the universe as a whole can be said of darwinian evolution, which is a mere subset of it. It's a natural process, and, like all natural processes in an atheistic universe, without purpose or intent.
At best, the most you can say about it is it just "is".
Development of species may be a result, but it is not the result of any purpose or intent. The continuance of a species may be a result, but it a result with no purpose behind it. Likewise, lungs may deliver oxygen to a body, but there is no purpose to lungs. The heart, may pump blood, but it has no purpose. The liver may cleanse the blood, but there is no purpose to the liver. Blood may get nutrients to where they need to go, but there is no purpose to blood. Eyes, ears, noses, mouths, and hands may provide sensory information, but there is no purpose to eyes, ears, noses, mouths or hands. Coagulation may stop bleeding, and we're all glad it does, but there's no purpose to coagulation, etc. etc. etc. etc. etc. etc.
So, just like the atheist may admit, "the universe sure looks designed, but, by gosh, it isn't", the consistent atheist should also admit, "it sure looks like evolution has a purpose, but it doesn't".
Because it can't.
There can be no purpose where there is no intent. There can be no intent where there is no intelligent being. And the atheist starting point is that there is no intelligent being, in spite of the evidence, or at least, appearance, of design and purpose.
Therefore, the very expression "The purpose of darwinian evolution" is a contradiction in terms. It is looking for purpose where there none because there can be none. And there can be none because the atheist does not have a sufficient cause for purpose to exist.
4. Taking this reasoning further:
If you equate darwinian thinking with science (as you, Joe Agnost do), and indeed with reality itself, then it is also wrong to think in terms of a heart that is functioning properly vs. improperly, or a liver that is functioning as "as it should" vs. in an unintended manner, or eyes that are functioning "as designed" vs. not, or a mind that is functioning normally vs. abnormally, as in "abnormal psychology".
Why? Because --
Since there is no purpose to any of these things -- the lungs, the heart, the liver, the brain -- they cannot be functioning properly or improperly. There cannot be proper/improper, normal/abnormal when there is no purpose for a thing and no actual design of it -- there is no criteria to judge it by. And, since by most darwinian's insistence there is no actual design, only the appearance of design, you cannot say that the heart, lung, liver etc. is not functioning as intended or designed or according to its purpose -- because none of these things exist.
The same, by extension, may be said of cells. The cell is a world of complexity and apparent functional purpose and apparent design. But, according to darwinian lights, it can be complex, but it cannot have purpose or be designed (for reasons already argued). Therefore, when a cell mutates and becomes cancerous, this cannot be viewed as improper, abnormal, wrong, or bad.
It "just is".
Now, this may work in theory, but I defy an atheist to admit this for practical purposes. When you find out you have an, ahem, enlarged heart, most atheists are going to think there's something abnormal about this, something wrong about and that the heart is not working as it is supposed to work, that it is not working as intended, as designed, etc. But, when an atheist strays into the realm of purpose, and proper intended function, it is no different than admitting design -- something that the atheist knows he must not and cannot do.
One of the overarching points I have been making on this blog is that atheism may "work" in theory, but it is impossible to live out consistently in practice in the real world.
To be consistent, the atheist should speak of the appearance of purpose, the appearance of normal vs. abnormal function, condition, etc., just like he has trained himself to do when it comes to design.
But when it comes to living life, we are forced to think, decide, and act in terms of believing that there is purpose and design to our bodies, our minds, etc.
The darwinian tries to, effectively, have it both ways.
But, attributing purpose, intent, apparent creative ability, design, normality, etc. to a mindless, undirected, unconscious universe is either anthropomorphizing or deifying the universe -- take your pick. In either case, it is using the language of intelligence, will, purpose and design -- and that's "cheating".
5. Perhaps, you could say, that when a darwinist takes about the "purpose of evolution", he is speaking scientifically when using the term evolution, but speaking metaphorically when speaking of purpose. Fine. If so, you should say so. And recognize that you are forced to use the language of intelligence and intent when talking about biological processes.
So, my advice would be to banish purpose from your vocab when discussing evolution. Talk, at best, about "outcomes", but not purpose. To reiterate, just like there is no purpose whatsoever for the universe as a whole, there is no purpose to darwinian evolution and the marvelous results this process supposedly produced -- there can't be.
6. A final "footnote": When a darwinian ascribes purpose to evolution, he is straying dangerously close to the notion of transcendence, and transcendence brings you closer to a theistic worldview. The argument from transcendence is made by theists, and is one of the better ones, IMO.
7. Now, Joe, you may disagree with me. And that's fine. But now when I say that evolution has no purpose, I hope you at least understand what I am saying and why I am saying it. And why, for your sake as a committed atheist, you should whole-heartedly agree with me.
And that's the way the Ball bounces.