Thoughts, in other words, are to be distinguished on the basis of purely qualitative criteria, and if there are two people entertaining the (qualitatively) same thought, there is (numerically) only one thought since there is only one propositional content.
In purely qualitative terms, it does not offer many advantages over Liebig's definition of acids, but it does provide a satisfactory definition for bases.
For any purely qualitative condition Bill satisfies, Bill* satisfies it too.
The relevant property need not be purely qualitative, for it may relate the object to herself.
Thus the purely qualitative descriptivist theory seems to avoid the above problems for direct reference theories.
Kaplan (1989a) gives modal arguments against purely qualitative descriptivist theories of indexicals.
Leibniz was one, and he thought that such essences could be given by purely qualitative properties.
Unfortunately his measures suffered from defects very similar to his purely qualitative proposals.
Thus, the final 18F-FDG PET/CT diagnosis was purely qualitative.
This paper investigates a purely qualitative approach to decision making under uncertainty.
A (unary) role is just a "purely qualitative" property of a certain sort, where (as described in more detail in the supplementary document on Qualitative Essences) a purely qualitative property is a property that "involves" no particular individuals.
