A Philosophy of Organism "" In general I agree you are correct, but just by good fortune there is very specific biological information that can set limits on metaphysical issues relating to origin of life. — Barry Z""
"Cool. Such as?"
Here is a good example of the value of input from biology on metaphysical thought.
In examining the question of whether life can develop from purely physical matter the first thing is to state the means by how this could happen. In a physical world without organisms this could only occur by matter acting in a way that obeys all the physical and chemical laws. We know from physics and chemistry that matter will organize itself into elements and molecules. It does this without purpose through random action, based on the properties of atoms, the strong, weak, electromagnetic and gravitational forces. For atoms to become molecules somewhat similar chemical forces cause their formation. All without purpose. This takes place by random action of atoms and molecules.
In a pre-life environment the only way for molecules to be formed is through random process. All organic compounds which are necessary for life must be assembled by a random process. One of the key organic molecules central to all life is the DNA molecule. It contains the code for everything necessary for life from the production of proteins to the metabolism of the organism. The DNA molecule is a polymer, that is a chain molecule made up of individual monomers known as nucleotides. There are four different nucleotide molecules designated A C G and T. These monomers due to their chemical structures are naturally prone to form chains of DNA. With a single nucleotide substitution polymers of RNA can also be formed. The chains that are formed by these monomers provide a more or less equal attraction to potential additions to the chain. If this were not true DNA would not be a good vehicle to store the code for life.
Strands of DNA range from about 160,000 base pairs (of monomers) for the most basic one celled organism to approx. 3 billion for higher organisms like humans. The probability to produce a particular human DNA chain would be 4^3 billion. Of course lots of other human beings could be produced with the same size DNA strand, but that only reduces the probability to something like 4^2.99 billion a number that is similar to 10^1.799 billion to put in a base ten frame of reference.
So for the smallest presently known one celled life form: each base pair has a one in four chance of being produced by random process. The odds of each successive base pair in the polymer is 1 in 4. So multiplying ¼ 160,000 times yields a probability of 1 in 4^160,000 or 1 in 10^96,000 a very large number. Using a similar kind of argument as originally used by Fred Hoyle, when you compare this to the fact there are only 10^80 atoms in the universe it can be seen by inspection that it will take an extremely long time to produce such a DNA strand by random process. Even allowing for the fact that there could be a trillion or more sustainable life forms that could come from reaching a chain of 160,000 pairs. The end result is it will take many orders of magnitude more time than the 14 billion years old the universe is currently estimated to be for life to originate from a pre life environment. From this point it can be shown that not only should a much older finite universe be considered, but an infinite aged universe should be considered as well. This demonstrates the impact that empirical biological information could have on metaphysical thought.