Clarence Irving
Lewis

Harvard (Philosophy Tree)


Nelson
Goodman

(Philosophy Tree)








Alfred L.
Kroeber

UC Berkeley (Neurotree)




Charles (Carl) F.
Voegelin

Indiana University














John Robert
Ross

University of North Texas




Barbara H.
Partee

U Mass Amherst


Robin Hayes
Cooper

University of Göteborg


Richard
Larson

SUNY Stony Brook



Li
Yang

University of Michigan
(Options)

Li YangX