Note to people in alt.agnosticism: this is a fascinating (for me at
least) discussion of the evidence, or lack thereof, for the existence
of a creator of our universe. In some strands of the discussion I
also spoke of my hopes, which correspond closely to C.S. Lewis's view
of the supernatural, but as I repeatedly point out, a sober assessment
of the evidence available to me suggests that the probability of my
hopes being realized is < 1%.
> >>>>> On Feb 15, 8:48 pm, John Harshman <
jharsh...@pacbell.net> wrote:
Harshman's first question sets the theme for this post:
> >>>>>> Would you agree that there is
> >>>>>> no good evidence for the existence of god?
And my answer begins to set the parameters:
> >>>>> No, there is lots of good evidence, but extraordinary claims require
> >>>>> extraordinary evidence, and so my standards for what constitutes
> >>>>> *strong* evidence in this matter are astronomical.
> >>>> Could you give me an example of the good evidence, just so I can see the
> >>>> sort of thing you mean?
> >>> One example is the incredible fine-tuning of the physical constants,
> >>> about which I've told you at least once. But, like Ray Martinez, you
> >>> refuse to acknowledge amazing coincidences as being any kind of
> >>> evidence at all.
> >> Agreed, and I have good reasons.
[...]
> >> 1) we have no idea what the
> >> distribution of possible physical constants is,
>
> > As long as it isn't self-contradictory, I see no barriers.
You made no response to this. I paraphrase it below.
> >> and so can't say that
> >> any particular values are unlikely, despite your claims;
>
> > The range of values compatible with life is very restrictive.
>
> You can't say that unless you know what range you are comparing them to.
As I suggested above, the range seems to have no bounds. Do you have
ANY reason for thinking there are any?
To refresh your memory, six of those constants and their significance
are mentioned here:
http://www.ichthus.info/BigBang/Docs/Just6num.pdf
> If the life-compatible range of constant X is from 1 to 1.1, that's very
> restrictive if the constant could vary from 0 to 10^6. But it's pretty
> broad if the constant could vary from 1 to 1.5. You don't know.
And neither do you. But if it is the former, or if the range has no
bounds at all, then I'd like an explanation of why you think the fine-
tuning is no evidence at all for a creator. And please frame it with
due consideration of alternatives 1 through 3 below, near the end of
this post.
> > The
> > trouble is, you are so close to nihilism, you see nothing special
> > about life being possible, and seem to think it would have been just
> > as well if there had never been anyone in the whole of reality able to
> > experience any of it consciously.
>
> I have never said or thought anything of the sort.
Sorry--I may have misremembered which person fits the above
description.
So, then, please tell me whether you think (I) below is much better
than (II).
(I) a universe in which an intelligent species such as ours is able to
understand and appreciate so much of it.
(II) a universe in which there is not and never will be any being able
to experience it consciously.
[...]
> >> 2) the range of
> >> parameters over which life (really, most often, stars) is possible is
> >> much greater than commonly imagined, because the usual scenario involves
> >> tweaking just one constant, when tweaking two at once shows additional
> >> favorable values. What is your response?
>
> > If you tweak one, the range of life-affirming values for the other is
> > moved over, but you have an uphill battle to show that it is
> > enlarged.
>
> I don't understand this either. What I'm saying is that the claim has
> been that the life-friendly region of parameter space is a single point,
...on a line. But really, it is a very small interval of the line.
See the url above.
As to your cryptic words "the claim":
I don't give a fig for what the *explicit* claims of others have
been. Anyway, I'd be very surprised if Cambridge University Professor
Martin Rees, who wrote the statements excerpted in the website whose
url I gave above, didn't ever write an analysis like the one I do
below, only much more detailed.
> based on any deviation in a single parameter being fatal. But instead
> (to consider only two parameters) it could be a line.
...in a plane. But really, it is more like a narrow ribbon in the
plane. Still a negligible part of the whole plane, probabilistically
speaking. I'll explain this another time, if you wish; I need to get
a good night's sleep because I'm due to give a seminar talk in
Charlotte tomorrow.
[...]
> > To put it another way: you go from a one-dimensional setting to a two-
> > dimensional setting, but the range of pairs of values is like a narrow
> > ribbon now, in a plane that stretches infinitely far in all
> > directions.
>
> Again, we don't know how far the plane stretches. but you will agree
> that there are suddenly a lot more points, right?
Not in a sense relevant to the probabilities involved.
> If you would look into
> the literature, you will find that for some estimates of parameter
> space, a high proportion of points allow life.
Not the literature I am familiar with. I've recently read a book
which purports to refute the fine-tuning arguments [it's even in the
title of the book, whose wording escapes me at the moment], and the
estimates given are purely speculative as to what proportion allows
life.
> > And if you go to higher dimensions, corresponding to all the factors
> > that the fine-tuning enthusiasts talk about, the range of values is
> > like a hyper-rope (an ordinary rope with three factors) that soon gets
> > to look like a curve with no thickness as you move away from it. In 3-
> > D, you could move forever and never encounter it.
>
> Let's not take the analogy too far.
Three factors, half the number that Rees talks about, is what the 3-D
picture analyzes.
> You don't know that the space is
> infinite. So are you acknowledging my point?
I stand by what I've written here.
And here are the three alternatives I mentioned above:
> > 1. Our young, small [compared with what it will eventually become--I
> > left that part out] universe is all there is (or was, or will ever
> > be).
>
> > 2. There is a supernatural creator of our universe.
>
> > 3. There is, for all practical purposes, an infinity of universes.
With minor variations, these are the main alternatives a serious
searcher of truth about a creator (or lack thereof) is confronted
with.
[...]
> > I predict atheism
> > will inexorably gravitate towards 3, because 1 makes 2 seem like an
> > uncomfortably possible alternative.
[...]
> Fine-tuning is by no means established, as I have
> tried to argue. If the universe were fine-tuned, we would look for an
> explanation, and I suppose 1 would not be a good explanation. If.
Well, let's see where this discussion takes us next.
Peter Nyikos
Professor, Dept. of Mathematics -- standard disclaimer--