A designed organism would, on the face of it, be in contradiction to evolutionary theory. Most biologists support the idea of evolution, by means of natural selection. They therefore reject the first premise, arguing that evolution is not only an alternative explanation for the complexity of life but a better explanation with more supporting evidence. Living organisms obey the same physical laws as inanimate objects. A range of chemical reactions could take place, forming other chemicals with complex properties and ways of interacting. Over very long periods of time self-replicating structures could arise and later form DNA. This has in fact been demonstrated artificially via the Avida program, which can construct complex programs without being given any design (similar programs have had similar results with building machines). Biologists therefore commonly view the design argument as an unimpressive argument for the existence of a god.