The article presents one of the problems taken up in her works by M. Ossowska. It covers
a number of specific problems, among others, the importance of descriptive-explanatory researci for
the evaluative-normative considerations, transfer from describing to evaluating and postulating the
structure of ethic systems. The presentation and analysis of M. Ossowska’s attitude toward} the
above mentioned problems is for the author of the article the basis to show her own reflections
concerning the possibility of passing from descriptive ethics to normative ethics.