Dear Sir,
There is no fundamental difference between your comments here and our essay, though certain things might have been unsaid. Regarding reality, please refer to our condition "intelligible/knowable". Everything is not intelligible to everyone at all times. Our actions for survival are influenced by our knowledge of our surroundings and how can we meet our needs. This knowledge; and its application; changes over time and space. Thus, what you say is covered in our definition. Regarding soul or spirit, we have not discussed. But if you define these terms precisely, we may not differ.
Your statement: "concepts that can predict observations are clear", has to be taken cautiously, as often our concepts are based on our observations and observations can be misleading. It may also be possible that the concepts define specific aspects only leaving out other aspects. For example, in our definition, space is both a backdrop as well as the interval between objects. Coordinates are used to measure spatial interval due to the following reasons:
1. To precise describe their relative order of arrangements with reference to an arbitrarily chosen origin.
2. Spatial interval may not represent true interval (e.g., on curved surface, etc).
3. To represent the macro representation of fundamental forces acting on a body: forces other than gravity act within the particle or from out of it (strong force attracts, weak force limits movement like in n-p chain or throws out like in beta decay, electromagnetic force moves from higher concentration to lower concentration, etc). Unless a conscious agent applies a force, all bodies due to the net effect of all internal forces against the gravitational force acting on any point. If the net is zero, the object is at rest or moving with fixed inertia. Coordinates show that representation.
Regarding GR, we had shown that it is a wrong description of mathematics. If you find anything wrong in our description, kindly elaborate. A line is either an imaginary concept (physically non- existent) or a marking on the surface of any three dimensional object including fields or graphs. The surfaces of these objects have no independent existence. Hence they are not one or two dimensional. Describing them as such is part description of a whole, which misleads. A line is not a series of points - which does not have dimension; hence do not physically exist. You are right about measurement, which is a mechanical process and abstraction of the result of such measurement as perception, which is a conscious process.
Regards,
basudeba