Intelligent design fails because it has no evidence to support it. But, it would fail even if there was evidence of design. This is because the conclusion that ID proponents want to prove is that God was the source of the design. However, even if we found out that DNA was designed, intelligent design would not be the logical conclusion.
There are better natural explanations than positing a supernatural creator. Directed panspermia, for example, is a better explanation. It hypothesizes that the seeds of life may have been purposely spread by an advanced extraterrestrial civilization. Richard Dawkins answered in a similar the same way when Ben Stein asked him how design might work. But, of course creationists created the straw man that he actually believed this.
Then again we have a great theory for explaining the complexity of life. It is the theory of evolution which is arguably one of the most supported theories in science. So, we don’t need intelligent design (the pseudo-scientific approach of creationism). Evolution is a fact and if you don’t want to accept it then don’t. But, you should stop trying to corrupt science with your religious pseudo-science.
