After thinking about for some time, it occurs to me that the problem with the theory of Intelligent Design is that it requires combining and organizing disparate parts into a whole; particularly complex structures may involve evolved parts which are themselves constructed from even more basic components making such a concept unimaginable.

But biological life begins as a whole (single cell amoeba) that evolves from a primordial chemical soup. It grows and evolves from infancy to adolescence to maturity. Only afterward does the evolved being manifest the intelligence to conceive the notion of organized parts.