shotgun wrote:How can it be, for example, that in a hypothetical universe where only material objects exist, mental objects can also exist? The one seems to preclude the other.
Well I kinda got into this with felix earlier... this is a problem with how you define words and concepts.
"Mental objects" being something other than "material objects" is a function of how you choose to frame the world in the first place.
How can atoms connect to the internet and log on to ILP... it would seem a near impossible task to elaborate on.
We have simple concepts like "browser" or "windows" and we speak in such terms all the time, but if you were to ask what is a browser made of... the answer would seem nothing like the object you're asking about.
The way we interact with the internet, software, or even the computer, allows us to remain blind to the material underpinning of it all, we merely need to understand what is displayed on the screen and how to interact with it using a keyboard and mouse... We'd have to establish a great many emergent properties and to do that we'd have to understand a lot of complex systems within complex systems, before we even got close to understanding the answer to our original question.
"Mental Objects", given the stupendous complexities of brains, are very likely similarly many layers of emergent properties away from the material underpinnings. Although given the unidirectional consequences of brain damage or manipulations on "mental objects" it seems quite conclusive that "mental objects" are in fact a product of brains, though we do not know how they are produced... unlike with computers, we don't have the blueprints for human brains.