These are excerpts and elaborations from my book "The Nature of Consciousness"
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Qualia The problem of phenomenal
qualities has puzzled philosophers for centuries. There is no red around me,
just particles. Where does the red that I see come from? That red exists in
my mind, but it does not exist outside my mind. Red is in me, not in the world. How can a reality made of
atoms of finite size be generating my feeling of something as uniform and
continuous as the color red? In 1929 the US philosopher
Clarence Lewis called them qualia (from the Latin quale, which is the dual of
quantum and refers to the subjective aspect of a thing). Qualia are qualities
that are subjective, directly perceived and known in an absolute way. The taste
of something, the color of something, a pain or a desire are associated to
qualia, to feelings of those things. Qualia are subjective: I
cannot be sure that another persons red is identical to my red. Qualia are known in an
absolute way: in another world red could correspond to a different frequency of
light, and we would have to change the branch of Physics that deals with
colors, but what I see as red I would still see as red. Why does Nature present
itself to my senses in two contradictory ways? If I believe my immediate
perceptions, there is red. If I try to make sense of my perceptions, I work out
a theory of Nature according to which there is no red, but only a vast mass of
floating particles. As a matter of fact, matter
is inscrutable to our consciousness. We would like to think that, if nothing
else, we know what the world is. We may be puzzled by the nature of mind, but
we do know what matter is. At closer inspection, even matter turns out to be a
bit of a mystery. We cannot perceive, and therefore conceive, what matter
ultimately is. Our mind presents us with a game of illusions, whereby the world
is populated with objects, and objects have shapes and colors. Science, on the
other hand, tells us that there are only particles and waves. We cannot
perceive that ultimate reality of matter. Matter is inscrutable to us. We know what consciousness
is because we feel it. We know what matter is because we sense it. Because we
can sense it, we can build scientific theories on the nature of matter. But we
cannot feel it, we cannot feel what matter ultimately is. Because we can only
feel it, we cannot build scientific theories on the nature of consciousness.
Although we can feel it. Back to the beginning of the chapter "Consciousness: the Factory of Illusions" | Back to the index of all chapters |
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