Every part of Darwins thesis is open to test. The clues from fossils, genes or geography differ in each case, but from all of them comes the conclusion that the whole of life is kin. That is no mere assertion, but a chain of deduction with every link complete. The biography of the AIDS virus, one of Natures newest and tiniest products, is almost complete and that of whales the largest animals ever seen is fragmentary, but they are cousins under the skin. The AIDS virus is change seen under the microscope, and the whale the same process viewed, in glimpses and over long ages, through a biological telescope. Evolution at the extremes of size is an apt prelude to the great drama that is Darwinism.
You should go through that book and assign each sentence a verse number.
Fallacy of affirming the consequent on full display.