10184
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Structuralists take the name 'R' of the reals to be a variable ranging over structures, not a structure [Burgess]
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Full Idea:
On the structuralist interpretation, theorems of analysis concerning the real numbers R are about all complete ordered fields. So R, which appears to be the name of a specific structure, is taken to be a variable ranging over structures.
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From:
John P. Burgess (Review of Chihara 'Struct. Accnt of Maths' [2005], §1)
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A reaction:
Since I am beginning to think that nearly all linguistic expressions should be understood as variables, I find this very appealing, even if Burgess hates it. Terms slide and drift, and are vague, between variable and determinate reference.
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10187
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Abstract algebra concerns relations between models, not common features of all the models [Burgess]
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Full Idea:
Abstract algebra, such as group theory, is not concerned with the features common to all models of the axioms, but rather with the relationships among different models of those axioms (especially homomorphic relation functions).
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From:
John P. Burgess (Review of Chihara 'Struct. Accnt of Maths' [2005], §1)
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A reaction:
It doesn't seem to follow that structuralism can't be about the relations (or patterns) found when abstracting away and overviewing all the models. One can study family relations, or one can study kinship in general.
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10198
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If only two indiscernible electrons exist, future differences must still be possible [Zimmerman,DW]
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Full Idea:
If nothing existed except two electrons, which are indiscernible, it remains possible that differences will emerge later. Even if this universe has eternal symmetry, such differences are still logically, metaphysically, physically and causally possible.
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From:
Dean W. Zimmerman (Distinct Indiscernibles and the Bundle Theory [1997], p.306)
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A reaction:
The question then is whether the two electrons have hidden properties that make differences possible. Zimmerman assumes that 'laws' of an indeterministic kind will do the job. I doubt that. Can differences be discerned after the event?
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10199
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Discernible differences at different times may just be in counterparts [Zimmerman,DW]
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Full Idea:
Possible differences which may later become discernible could be treated as differences in a counterpart, which is similar to, but not identical with, the original object.
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From:
Dean W. Zimmerman (Distinct Indiscernibles and the Bundle Theory [1997], p.307)
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A reaction:
[compressed] This is a reply to Idea 10198, which implies that two things could never be indiscernible over time, because of their different possibilities. One must then decide issues about rigid designation and counterparts.
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7903
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The six perfections are giving, morality, patience, vigour, meditation, and wisdom [Nagarjuna]
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Full Idea:
The six perfections are of giving, morality, patience, vigour, meditation, and wisdom.
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From:
Nagarjuna (Mahaprajnaparamitashastra [c.120], 88)
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A reaction:
What is 'morality', if giving is not part of it? I like patience and vigour being two of the virtues, which immediately implies an Aristotelian mean (which is always what is 'appropriate').
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