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|Qualities||Holz I 46
Quality/Leibniz: simple qualities, e.g. colors, odors, taste are expressible only by themselves and not by other characteristics. They are not further provable. (Since they cannot be traced back to simpler components (qua definition) by the identity principle).
The simple sense qualities are "projections" (like parabola to the circle, each point of one side corresponds to one of the others). That is, that they are not to be regarded as identical expressions of the reality corresponding to them.
G. W. Leibniz
Philosophical Texts (Oxford Philosophical Texts) Oxford 1998
H. H. Holz
Leibniz Frankfurt 1992