From: Sir Frederick Martin on
On Sun, 27 Jun 2010 17:25:14 -0700 (PDT), Immortalist <reanimater_2000(a)yahoo.com> wrote:

>Humans have different kinds of access to the mental and the physical
>in terms of the differences between the "a realm of appearances" as
>distinct from reality. In that context there is a distinct realm of
>appearances because the mental, which includes ideas or
>representations which have the epistemological status of appearances,
>itself constitutes a distinct realm.
>
>Each of us has direct access to our own states of mind in a way that
>we do not to the physical. The mental thus involves so-called
>privileged access.
>
>If we have direct access only to the mental, then the mental
>constitutes in some form the only reality. It is difficult to see how
>there could be access of any kind to anything else but the contents of
>our minds.
>
>For what principle of inference is there that could take us from the
>so-called mental representations to anything else, despite the
>seductive suggestions in the notion of representation which may make
>us think that there must be something for these mental entities to
>represent? We have direct access only to ideas or mental
>representations. Since these do not constitute a reality of public and
>physical objects they can be thought of as a realm of appearances
>only.
>
>Idealism stems from this with the additional thought that, since we do
>not have access to anything beyond ideas, the only reality which we
>have any justification in assuming is those ideas, the appearances
>themselves.

The appearances are called qualia.
I call 'sensor' and 'self' qualia, separately.
'Sensor' qualia as in 'red' or 'sour', etc., and 'self' qualia
as in 'feelings' or 'consciousness', etc.
>
>Metaphysics - by D. W. Hamlyn
>http://www.amazon.com/exec/obidos/tg/detail/-/0521286905/