[peirce-l] Peirce and Fuzzy Logic

[Clark Goble]

Someone mentioned to me that Daniel McNeill and Paul Freiberger in  
_Fuzzy Logic_ say Zedeh's fuzzy logic arose from Peirce and Jan  
Lukasiewicz. Now certainly Peirce often ridiculed clear boundaries  
(such as between say the living and non-living).  And one could argue  
that his doctrine of continuity entails something like fuzzy logic.   
But did Peirce ever relate his notion of vague signs to fuzzy  
properties?  All I could see were properties that weren't up to the  
listener to determine.  That says nothing about whether the  
properties are properly determined external to the listener, whether  
they are ontologically indeterminate, or whether they are "fuzzy."

Is there anything Peirce writes on this?


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