In the previous posting I described a popular IDC argument that things like watches and Mount Rushmore are obviously ‘designed’ objects and thus imply the existence of a designer. By analogy, it is asserted that certain biological systems are also supposed to bear the hallmarks of design and thus must require a designer (aka god) too.
This argument seems to be persuasive to many people because I repeatedly hear it various forms. The usual response to it by scientists is to argue that the appearance of biological design is only an illusion and that random mutation and natural selection are perfectly capable of producing the seemingly complex biological forms that seem to stymie the IDC people.
But there is a philosophical issue here as well and that is what I want to address. First of all, while we all supposedly can agree that a watch and Mount Rushmore could not have simply appeared without human action, how is it that we are so sure that this is the case that we can accede to it without argument? How is it that in these cases we can definitely identify them as designed objects and say that other things (like rocks) are not designed?