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|Index Words||I 161
Index/Index word/Adaptor/Millikan: unlike other words, the adaptor for an index word is not simply another part of the sentence. It can lie outside the sentence. ((s) pointing, anaphora, etc.).
Adaptive Eigenfunction/Millikan: E.g. Chameleon: the color-producing units are adapted eigenfunctions.
Index/Index word/Millikan: E.g. Suppose a chameleon is suspended in the air and has no background on which to align its color pattern. Then there is no adapted eigenfunction.
Sentence: every element of a sentence has a relational eigenfunction. Only with it, it is completely described as a sentence part. Individual words do not have an adapted eigenfunction.
Index word: has two relations: a) to something within the sentence - b) in addition to something outside.
"I"/Millikan: is translated by me into an "inner name".
"He"/Millikan: if "he" has no antecedent ((s) no anaphora), then it has no adapted eigenfunction. But it has a relational eigenfunction:
Relational Eigenfunction/Index word/Millikan: is the function to be translated into an inner name that has the same referent as the antecedent.
E.g. chameleon: here the normal condition for the image must have two components:
1. There must be a background (existence, existence condition).
2. The color pattern must be more or less the same. (Mapping condition).
Adaptor/index/index word/Millikan: if an index does not have an adaptor, it lacks the full meaning, not truth.
There/Index word/Millikan: presupposes "this": "in this place".
This/index words/Millikan: "this" is usually conventional, passed on from speaker to speaker.
There may also be "improvised" methods of application. These are not conventional. Improvised techniques can be repeated without leading to reproductively determined families.
Of course: there can be "natural" methods, these are also not conventional: e.g. gestures.
"This": (other than "I" and "You") must be added, by specifying the nature of the object. "This" seems to be a special kind of a free variable.
Referent/this/Millikan: the referent is largely determined by the rest of the sentence in which "this" occurs.
R. G. Millikan
Language, Thought, and Other Biological Categories: New Foundations for Realism Cambridge 1987