Definitive Evidence that ATP Synthase was Intelligently Designed
If you take a look at ATP synthase you can see it consists of two major subunits (F0 & F1) that are connected together by an external tether. This tether doesn't have anything to do with the functionality of either subunit but without it no ATP synthase. The problem for evolution by blind and mindless processes is exacerbated. Not only does it need to produce the two subunits but one has to be embedded in some membrane so that a gradient can be formed. And the other has to to be stably tethered to the membrane the proper distance away. The tether looks like the membrane subunit F0 somehow formed an external docking site the proper length with F1 forming an external mating site.
Again these two different protein subunits, the tether and mate, have nothing to do with the function of the protein complexes they are attached to and tether together. And without them there is no way to get the two working subunits together to produce ATP.
There you have it- A simple external tether that stably holds the major F1 subunit/ rotary motor the proper distance away from its F0 motor force is evidence for the Intelligent Design of ATP synthase. The two major subunits and how it works is just icing on the cake.