Quote:But, how can you know that? In a reality without an human brain why should things be exactly as our poor and limited brain configures them?
Of course, the only way that reality can be perceived, is by a conscious being, and because of this, we can say that even without a human being there, reality would be as it is when it is perceived. Without any observer to sense it, then any attempt to figure out how reality looks like is futile because looks is a sense and thus a cognitive part of being aware of reality.
The laws of physics would exist independently because it works. Reality might not "appear" the same to our senses from one specie to the next because it depends on the sensory capability of the observer, but the laws of physics is nevertheless there, and our senses follow these laws of physics.
If you are trying to find out how reality looks like to an unconscious thing, then it is futile since there is no such appearance of reality for an unconscious thing. We have to look at reality from our sense capability because this is the only way we know how reality looks like and there's nothing wrong with that because our senses are a direct representation of at least some portion of reality, and we can know of "invisible" things directly(neutrinos) from our rational and empirical capability.
Quote:I didn't say that laws of physics are exercise of imagination. I said that the belief that those laws remain in a reality without human beings is an exercise of imagination. Like God.
Of course we would have to imagine what it would be like, because we are limited to a particular space, but this imagination is a basis of something real. Again, the only way we know of what reality looks like is through our best empirical and rational ability. When we are looking at reality that we sense, we are looking at something real, being sensed, we are aware that it is there.
When we are trying to look at the fundamentals of reality, we are trying to understand it in the deepest sense.