EN
The paper evaluates W. Sady's criterion of demarcation between science and non-science according to a metacriterion proposed by L. Laudan. The outcome of the examination is rejection of Sady's proposal. First, it is not-adequate, as it eliminates all discoveries not made in a systematic, planned way, even if they are of scientific importance and contribute to development of science. Secondly, it is not sufficiently precise, at it gives only the necessary condition of scientific status. Additionally, this short review points out some other flaws in Sady's theory.