ONT Re: Tone, Token, Type
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| All general, or definable, Words, whether in the sense of
| Types or of Tokens, are certainly Symbols. That is to say,
| they denote the objects that they do by virtue only of there
| being a habit that associates their signification with them.
| As to Proper Names, there might perhaps be a difference of
| opinion, especially if the Tokens are meant. But they should
| probably be regarded as Indices, since the actual connection
| (as we listen to talk) of Instances of the same typical words
| with the same Objects, alone causes them to be interpreted as
| denoting those Objects. Excepting, if necessary, propositions
| in which all the subjects are such signs as these, no proposition
| can be expressed without the use of Indices. If, for example, a man
| remarks, "Why, it is raining!" it is only by some such 'circumstances'
| as that he is now standing here looking out at a window as he speaks,
| which would serve as an Index (not, however, as a Symbol) that he is
| speaking of this place at this time, whereby we can be assured that
| he cannot be speaking of the weather on the satellite of Procyon,
| fifty centuries ago.
|
| Charles Sanders Peirce, 'Collected Papers', CP 4.544.
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