EN
Based on the critical analyses of monographic work written by Wroclaw's slavist Jaroslaw Lipowski named 'Convergence and divergence of Czech and Slovak languages in Czechoslovakia' (Wroclaw, 2005) the author writes about the relations of Slovak and Czech language in 20th century. The traditional slavistic question is treated on the background of the generally accepted knowledge that Slovak and Czech are two structurally and genetically different but close Slavonic languages. In exploration of the subject matter author pays special attention to methodological questions. .