EN
It is shown that, nowadays, the notion of the rationality of science has been subjected to deflation. This deflation occurs, because every philosophical conception of science generates its own notion of rationality that is arbitrary, particular, closed in one conception of science, not applicable to comparative appraisals of science in respect to rationality, and, therefore, non-effective, useless. In order to restitute the value of the category of rationality it is necessary to return to fundamental and non-particular rooting of its sense, namely to rationality viewed as rational character human being.