To start with, it needs to be made clear that all that's being claimed is that the teleological argument makes belief in a Creator more reasonable than disbelief. So it would be reasonable to believe that an intelligence designed certain features of the universe based on the teleological argument.
Let me give an example of what would make one conclude that an intelligence is at work:
A) A precision is observed
B) The precision produces a surprising effect
C) The effect is repeated
D) The effect is unnecessary for life to exist
Care to elaborate on "B"? What qualifies as "surprising"? I mean, if we go from the starting point of the big bang, depending on whether you hold to determinism or not, it's either
infinitely unlikely that I would press the "Minecraft" button on my taskbar in about 10 minutes (once I get done with the 25 or so alerts I have), or it's a 1:1 chance. Neither answer bodes well for this argument. If
every basic thing is infinitely unlikely (1:1 billion chance of sperm meeting ovum times however many generations of ancestors I have, plus whatever else is incredibly unlikely), then nothing can be considered "surprising". After all, a royal flush of spades is a rare hand in Poker, but so is 3S 5H 2C 7S 4C. If everything is guaranteed, then any argument for probability flies out the window, as no matter
what the circumstance is, it was guaranteed.
http://www.theguardian.com/science/2012/nov/13/total-solar-eclipse-australia
Notice the photograph of a total solar eclipse from the link above. Note that the moon virtually exactly covers the sun during a total solar eclipse, leading to a tremendous lighting effect.
Wow. That is some
sloppy logic. The moon completely covering the sun in the case of a solar eclipse seems unlikely, until we consider how many planets and moons there are. What are the odds that any one of them would have this effect? And of course, it's not
precise. The moon's covering varies greatly from month to month, as well as year to year; as take your pick of the Hovind clan would point out, "WE'RE LOSING THE MOON!" (And at some point in geologic time, this covering will no longer take place in any meaningful way). Now let's add the factors that a habitable planet will almost certainly be not greater than a certain size, that a planet of that size can only have moons up to a certain size, and how do the odds look? Of course, you have no way of calculating the odds because we still don't know that it
could be any different. And if it could be any different, how different could the earth be? And of course, the covering is not "precise" in any meaningful sense; the range of viable options is actually quite ride.
And of course, how this effect is "surprising" is beyond me; if the universe is not deterministic, then
every single thing done by every single human ever is "surprising"; if it is, then
nothing is.
A) Chance produced a total solar eclipse
or
B) An intelligence produced a total solar eclipse
Since there's a great deal of precision involved, producing a surprising effect, which is completely unnecessary for the existence of life, I would argue that it's far more reasonable that an intelligence produced it rather than chance.
Let's point out for a moment that D) is necessary to avoid the anthropic principle, because anything that doesn't fulfill D) actually provides us good evidence that no form of intelligent is necessary at all (after all, a god could create a universe wherein things necessary for life as we know it
didn't exist and still have life). But in this case, how could you
possibly assert that it's more reasonable that an intelligence produced it? Assuming that the universe is not deterministic, we know full well that random natural processes can create moons, suns, and planets, and create a whole lot of them - there's absolutely no reason to believe that it could not have come about by chance. Meanwhile, saying "an intelligence produced something" without first demonstrating the existence of that intelligence... Um, how does that work? What are the odds of
that?
In order for you to defeat this version of the teleological argument, you would have to explain to me why it's more reasonable that chance causes total solar eclipses rather than an intelligence. And that I don't think you can do.
We have done absolutely
nothing to establish that this intelligence exists in the first place!