Original sentence: Fink asserts that some concepts which Sokal and Bricmont consider arbitrary or meaningless do have roots in the history of linguistics, and that Lacan is explicitly using mathematical concepts in a metaphoric way, not claiming that his concepts are mathematically founded
Edited sentence: He points out several things that they accuse of being arbitrary or meaningless that in fact have well-established roots in the history of linguistics, and asserts that Lacan is explicitly using mathematical concepts in a metaphoric way, not claiming that his concepts are mathematically founded