Stylistic evidence and laboratory evidence strongly support the claim that the magnificent painting Garden of Eden is a work of the Flemish master van Eyck. Nevertheless, the painting must have been the work of someone else, as any one with a little historical and zoological knowledge can tell merely by looking at the painting. The animals in the painting are all vivid representations of actual animals, including armadillos. Yet armadillos are native only to the Americas, and van Eyck died decades before Europeans reached the Americas.
The first is an intermediate conclusion drawn in order to support a further conclusion stated in the argument and the second provides evidence in support of that intermediate conclusion is the role played by the two highlighted portions in the argument.