what this case is made of
Two of the four rest on a company that owns a thing that cannot be built or permitted twice; one of the four rests on a company that is wired into how the customer already works. One is a reason to hold rather than a reason a rival cannot displace it, and it is not forced into a kind.
Read off the kinds of reason, not written by hand. No fifth held back and no summary above them that says something the four do not.