I have given many examples. For example, you can find the same engine in a Toyota car and a Toyota pickup, but two different engines in the same model of Toyota car. You can find the same tires on a Chevy and Ford sedan, but two different types of tires on the same model of Ford sedan. I could go on and on.
If you think I am wrong, the define the shared derived characteristics for a group of human designs and show how they fall into a nested hierarchy.
How do Mac computers fall into a nested hierarchy? What are the shared derived characteristics? What does the phylogeny look like? What method did you use to construct the tree?