In this review, I review both volumes II and III of Takashi Iida's Book:
Gengo-Tetsugaku Taizen, and examine two arguments proposed in vol. II. One is concerning criticism against conventionalist's explanation of truths of logic which was approached by Quine. I think that truths of logic should be comprehended in Quine's holistic view of knowledge. The other is concerning criticism against Quine's holism which was suggested by C. Wright. I hold that the statement
W:
θ |-
L I →
P which Wright proposed can be also abandoned together with theory
θ to which
W relates if the
θ is abandoned.
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