 One of his most significant contributions to the classical epistemology of linguistic analysis can be found in his comment on the general problem of identity and difference which, as we have seen, the representatives of the Neo-Mohist school were unable to develop to a concise conclusion (Hui Shi in Zhuangzi CTP: Tianxia, 7). He claimed that any two things were always different in something, no matter how equivalent they were in all other respects (otherwise they could not represent two separate entities). Yet even two things that seemed to be completely different were likewise identical in at least one quality, since they were both parts of a unified structure (otherwise, it would not be possible to express, or even think of them in the framework of language).