[quote]Aragorn wrote:
Mattlebee wrote:
The trouble with trying to boil things down to simple statements of implausibility is that while it works for religious views, it doesn’t for scientific ones without twisting what’s actually thought. The logical opposite to “premeditated design by a creator” may be “completely random processes”, but it’s not a description of evolution.
Here is where I believe you are mistaken. First and most importantly, statements of implausibility DO work in science, and can be done without twisting what is thought. It has happened numerous times and will happen numerous times.[/quote]
Example?
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The theory of natural (and sexual) selection leading to the evolution of all the lifeforms we see today is the exact opposite of a random process. Creatures were selected by their ability to survive and reproduce, not at random.
Secondly, Evolution is by definition a random process–random mutations of DNA leads to random mutations of genes.[/quote]
Evolution is by definition a directional process, which improves on what was there before. Random change goes in all directions.
Mutations aren’t completely random, but that’s not really the important part. Mutations simply create variation in DNA sequence, which may create variation in protein sequence, which may change the way the protein works, which may change something about the organism.
If the change makes it more successful then its genes will propagate. Organisms without the mutation who are in direct competition with the mutated organism will fail to reproduce to the same level, and the frequency of the non-mutated gene will start to decrease. Self-sustaining, directional change.
The process that’s random is whether or not a mutation occurs. What happens after a mutation depends on whether the mutation aids or hinders survival/reproduction and is therefore clearly not random.
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Assign a random number algorithm to generate numbers between 1 and 1 000 000 000 000. Then apply a filter that deletes all numbers below a chosen ARBITRARY value. The process is random. The fact that some are filtered and dumped and some are retained in memory has no bearing on how the numbers were generated in the first place. [/quote]
It’s not evolution if it’s arbitrary. It’s also not a random process if the cutoff number has been CHOSEN. Some sexual selection can appear to be arbitrary in its origins, but ultimately there is choice involved.
Survival is what matters and since the majority of random mutations in genes will produce deficient proteins, the majority of mutations will cause the death of the organism (often before birth). The set of random mutations therefore strongly overlaps the set of fatal mutations, but only slightly overlaps the set of advantageous mutations. It is therefore a biased, not random, process.
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As for life spontaneously erupting, well life begins with the molecules that make up living organisms. Any molecule which can self-replicate, or be replicated by another molecule will accumulate. Natural selection works for molecules too.
As for life spontaneously erupting, you completely underestimate the complexity of a “molecule” able to replicate. Technically speaking, our entire 2 billion base long DNA genome is “1 molecule”.[/quote]
Conceptually it may be, but technically it’s not. It’s chopped up into chromosomes - a far from insignificant difference. Humans and chimps can’t interbreed simply because we have a different number of chromosomes. Our genomes are extremely similar, but arranged in a way that means they can’t be merged by normal reproduction.
It’s not complex, though. It’s just a long string of four types of molecule. Bacterial DNA is no different to human DNA, as a molecule. Only the sequence of those four molecules makes the difference, because they code for proteins which actually “do stuff”. The stuff being done is indeed very complex, but DNA itself isn’t.
No faith required. The four building blocks of DNA (or RNA) aren’t especially complex and are just variations on a theme anyway. A single strand of DNA will spontaneously form a double-helix with another (complementary) piece of DNA (or RNA) thereby becoming more stable. Stability is a requirement for continued existence. I think someone else posted a link to an experiment where scientists had made some of the building blocks through simple spontaneous chemical processes.
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As for the universe creating itself from nothing, there are viable holes in the Big Bang theory. There are a number of scientists unhappy with the theory, and you don’t have to look to creationism to find them either. [/quote]
I wasn’t suggesting science had the origins of the universe explained, just that creating something from nothing is just as much of a problem for theology as science.