Basudeba,
Hi. Thanks for the feedback!
When I said "philosophical engineering", it's just a phrase I liked that kind of summed up how I was talking about what are traditionally thought of as abstract concepts (existent states, spheres, etc.) but treating them as existent states and trying to build a model of the universe out of them. I don't distinguish between abstract concepts and other existent states. Abstract concepts are just existent states in the brain and traditional concrete objects are existent states outside the brain. No one has yet been able to show me where the Platonic realm is.
In trying to think about where everything comes from, where does perception come from? At some more fundamental level, there must have been some existent state (set of physical/mathematical laws, quantum fluctuation, etc.) that was able to give rise to a universe in which perceptions exist.
There are many things that look totally different when seen by different "perceptions", or minds. But, the underlying thing is still the same. Is that what you were trying to get at?
Thank you again for reading the essay!
Roger