That common decent is shown to be true because of similarities in the structure of the DNA can it be said similarities are the sources of the evolution of species?
In other words, to prove evolution is undeniably true one just needs to look honestly at the similarities in the species. True?
No, there is a tonne of other evidence. DNA is a pretty recent discovery. Darwin didn't know about it, although he predicted something of that nature. He was basing his theory on morphological similarities and the geographic proximity of similar species and for a long time that's what all biologists did. DNA is powerful supporting evidence for what we already knew to be true.
Proof is for gin and rain gear. Scientists work with evidence.
All our evidence, bar none, leads to the logical conclusion that all life on earth is descended from a common ancestor.
This the point I needed to be addressed. Thank you.
Nothing that contains DNA is independent (or free from influenced) of the first living DNA which is called common descent. Is common descent a necessary phenomenon to believe if one believes in the model?
Yes, common descent is pretty fundamental to the theory. It's not that life
couldn't have arisen in a number of places - nothing in evolution would deny that possibility - we just happen to know that it didn't, thanks to the evidence. Or, if it did, one ancestral species out-competed all the others, and they are the shared ancestor we have with every living thing on earth.
Well, no, but it sure is funny. A boats leads to a trip of discovery. Very good!
What I mean is similarities in species might be coincidence just like the discoveries in science are. But you say NO! The similarities in species prove they are linked. The similarities in the scientific mind does not prove the minds are linked, do they?
The discoveries were not coincidence. They followed logically from our collective state of understanding up to that point.
Something is off? You are right! Sometimes the thing that is off is called cognitive dissonance.
No, you're basically saying that if two men suddenly discover the sky is blue, they can't be brothers. One thing has nothing to do with the other.