My confidence level that life and the universe (and all the rest of existence if there is more than one universe) arose by purely natural means: 100%
My confidence level in any particular theory about the natural world depends upon the evidence.
My confidence level that evolution happened, that life changed over time: 100%
My confidence level that descent with modification combined with natural selection played a very significant role in evolution: 100%
My confidence level that this universe began from a little speck and passed through a period of rapid expansion known as the big bang: not quantitatively expressible because I think there is too much that we do not know. We still know very little about dark matter and dark energy, and the matter and energy we can see is apparently only a small portion of the total universe. Until a decade or two ago we didn't even know the expansion of the universe was accelerating. How could our theories about the origin of the universe be accurate when we know so little about so much?
--Percy
™ Version 4.2
