Georgina Woodward
It is not a matter of defining words like “reality” or detailing the physics or detailing the mechanisms. It is a matter of looking at the actual world:
Contrary to your blind man and elephant model, the survival of life, from the most primitive life onwards, depends on their being able to correctly perceive and analyse and respond to the current situation in their immediate surroundings.
But in order for the most primitive life to have correct perception, this correct perception can only develop and be built out of low-level matter like particles, atoms and molecules also “correctly perceiving” aspects of the other low-level matter they interact with.
This necessary-for survival knowledge must be built from the ground up, on rock-solid real foundations. Necessary-for survival knowledge can’t be built on imaginary unreal foundations.