fresco,
I'll have a look at your old thread.
I agree that something observed implies something observing, and vice versa. But that doesn't rule out unobserved things. It seems arbitrary to use the term 'reality' to describe the interface between observers and observed things, because it is perfectly possible that things could exist (and therefore be part of 'reality') which are unobserved; either unobservable, or just not presently being observed.
Quote:The commonality of language and perceptual apparatus provides the basis for consensus and "meaning" (as opposed to "truth") which is subject to paradigm shifts. In as much that "science" uutilizes a relatively culture free metalanguage (mathematics) degrees of consensus are likely to be higher.
I agree with this. But even if all we are able to reach is a concensus, that does not rule out the possibility that there is a real world out there. Perhaps realism is true, and our experience of the external world, once mediated through sense and cognition, allows us to reach good approximations of what that world is like in-itself.
When I look at a pear, I don't 'see' it directly. All I am really aware of is a mental state. But that doesn't necessarily mean that my mental state is not caused by a real, physical pear, which continues to exist even when it is not observed.
It seems arbitrary to assume that reality is only the connection between observer and observed, and that there is nothing in reality which is not observed. But then, my position is equally arbitrary.
Your claims seem to be kind of solipsistic, but solipsism is just something that I don't like the idea of. It's not something that I know how to refute. Ho hum.