〈同じさ〉とは何か

―西郷甲矢人・田口茂『〈現実〉とは何か』（筑摩書房）の書評―

抄録

    ‘What is reality?’ is a Japanese book whose authors are a mathematician and a phenomenologist. The authors examine the general structure of nature as well as our behavior. In the present note, we review its content from the perspective of identity, which is an isomorphic natural transformation according to the authors.