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.