2 - Computing is used to solve real world problem.
3 - "In building software we inevitably invent or use abstractions to represent or effect real world things." Here is the problem where we part company.
4 - Abstractions that inform computing systems are indeed useful.
[edit+ps]
self disclosure: I've reached 'architectural orbit' numerous times in my career. 30 years later, I am sharing a subtle point. Effective software models cutout attributes of real world elements of the problem domain. All attempt to "model the world" end in tears.
