(For the distinction between phenomenal and non-phenomenal belief see Nida-Rumelin 1996 and 1998).
The goal is to describe how this public record exhibits certain (perhaps non-phenomenal) patterns that are projectable.
Phenomenalists tend to make use of the same sorts of features (function, intrinsic structure) in explaining some of the intuitive differences between thoughts and experiences; but they do not suppose that such features exhaust the differences between phenomenal and non-phenomenal representations.
Both may have believed, in a sense (the non-phenomenal sense that does not require use of phenomenal concepts) that the sky appears blue to normal perceivers while still in their black-and-white environment (they may have been told so by their friends).
Indeed, on the assumption that non-phenomenal psychological states are functional states (that is, states definable in terms of their role or function in mediating between stimuli and behavior), my zombie twin has just the same beliefs, thoughts, and desires as I do.
In a second, more restricted sense of the term 'qualia', then, qualia are intrinsic, consciously accessible, non-representational features of sense-data and other non-physical phenomenal objects that are responsible for their phenomenal character.
(Though if we say there is such non-intentional phenomenal character, this would give us a special reason for rejecting the representationalist explanations of phenomenal consciousness mentioned in Section 5).
In short, we need to experimentally distinguish between self- and non-self-specific phenomenal measures.
They examine the interrelationship (which is ultimately non-dualistic) between the phenomenal world, its sounds (or "voices") as "signs" (or "letters"), and reality itself, the "meaning," they convey.
The difference between a spry "oldster" and a non-spry "oldster" is phenomenal.
We may think that the pleasure and suffering that demand our ethical concern are necessarily phenomenally conscious — and that this evaluative significance remains even if phenomenal character is non-intentional.
