I suppose I am advocating the Correspondence theory of truth. As a man of science, I believe in the laws of physics. I believe in cause and effect. I believe that my experice (which consists only of electro-chemical activity in the brain) is caused by the input of my nerves, which is caused by the impact of physical reality on those nerves.SQ: The truest understanding of the difference between fiction and reality would then require an understanding of the difference between the physical world and our perception of it.
DH:You seem to be advocating a Correspondence theory of truth, which I think has some problems. Most generally, it has the assumption that there is an objective reality "out there", even though you can never sense it in any way - the part you sense and think about being part of your mental model, not the "out there" physical objective reality.
If that 'objective' reality can not be sensed in any way, what does it mean for it to be real? And how can that ghostly realm that can not be sensed in any way be more real than what is actually experienced?
This may be another direction from which the Buddhist concept of emptiness can be approached.
You are however correct in pointing out the underlying assumptions that there is something out there to cause the stimulous of my nerves, or that I have nerves at all. It is only my experience that tells me those things are there.
I read the Wikipedia page you linked to about the correspondence theory of truth, and it does seem to be a bit circular. My knowledge being verifiable only by my knowledge, or that of others, when the only thing we can truly know is what we are experiencing and not whether it is real.
Pending further reading into this matter, I would say that our experience is not real. Only an illusion that it is stimulated by something. I do not believe that the illusion is an accurate representation of that thing that stimulates it. Even if one believes in a physical reality (which I do) one must admit that our senses are capable of detecting only a tiny, tiny fragment of the phenominon within it, and therefore the illusion is woefully incomplete.
I believe the things that stimulate our experience are real, but I don't imagine there's a way to know whether our experience is in any small sense acurate to those things, since we are locked into the illusion.
In short, I believe in physical reality, but I know that doesn't make it real.