RT Journal Article SR Electronic A1 Faltýnek, Dan T1 And thus the Circle has got its seventh publication JF Bohemica Olomucensia YR 2013 VO 5 IS 4 SP 318 OP 328 DO 10.5507/bo.2013.033 UL https://bohemica.upol.cz/artkey/boh-201304-0005.php AB By simple argumentation I show that it is not possible to build explanation of the history of linguistics on nonlinguistic (nontheoretical/nonconceptual) facts. External coefficients are very important in the development of linguistic science, but in the explanation of linguistic history they must be only ilustrative. This broad issue is presented by contention about linguistic purism, whose two protagonists are Prague Linguistics Circle and Jiří Haller.