In this great article Gary Marcus brings to attention the falsehood of the conception of an intelligent design, by listing some of the biases in our mind as well as design flaws in our body.
This discussion reminded me the answer of Sir David Attenborough, the legendary nature documentary producer, to questions regarding creationism:
My response is that when Creationists talk about God creating every individual species as a separate act, they always instance hummingbirds, or orchids, sunflowers and beautiful things. But I tend to think instead of a parasitic worm that is boring through the eye of a boy sitting on the bank of a river in West Africa, [a worm] that's going to make him blind. And [I ask them], 'Are you telling me that the God you believe in, who you also say is an all-merciful God, who cares for each one of us individually, are you saying that God created this worm that can live in no other way than in an innocent child's eyeball?