This is another chapter of the continuing discussion I am having with a local Pastor. Part 3 can be found here:
Me -> “Can you define evolution for me?”
“My understanding of evolution is that it is the process whereby scientists try and explain how life evolved from the simplest of structures to the complex creatures we have on our planet today.”
Not a bad definition, although the “try” part is humorous. I guess it’s no more inaccurate than the theory of gravity ‘only scientists trying to explain why we don’t fall off the Earth.’
“BTW I don’t believe that evolution talks about the start of life so Darwin’s treatise “The origin of Species” should have had a different title.”
That’s why Darwin didn’t call his book “The Origin of Life” because that’s not what it explains. He outlines the origin of species. Have you read it?
“No it’s not – all we have in the fossil record is different types of animals not that they have changed.”
Do you expect an animal to change after it has died? can you explain the progression of forms over time as indicated by the geological column and dating methods? Did your creator create this organisms just so they could be destroyed and replaced with other (but similar) ones? How does your model work?
“And the type of changes that we can measure do not prove evolution, all that they prove is adaptation and mutations.”
Mutation (although I prefer the term change) and natural selection and what drive adaptation – you have just described evolution in the same breath you denounce it.
“The famous moth we all studied in high school biology that changed from white to black so that it could blend in with soot coloured trees is no more evolution than my whole family had brown eyes except me but all of my kids have blue.”
This comes down to your definition of species or “kind” (whatever that actually is). A species are two organisms which are unable to produce viable offspring – genetic islands if you like. A “kind” is not defined scientifically and I have yet to hear a coherent definition of one.

Take a single population of moths and randomly split them into two groups. Place one group in an environment where black ones will have a better chance of survival. Let random DNA changes in each generation and natural selection take its course. After a number of generations there will populations of white moths and black moths. Perhaps at this point they are still able to breed (and are thus the same species), but given enough change the two populations will no longer be able to breed and will become (by definition) two *species* of moth.
Are they still moths? Yes. Their descendants will always be moths for one cannot escape your ancestry. If a moth suddenly turned into an octopus it would be great evidence – for creationism.
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