Abstract

The author quotes some opinions according to which the valuations have no cognitive value: the valuations have no truth-value; they cannot be decided basing on experience; the have no significance in the semiotic sense of the term; no problematic of the semiotic characteristic of valuation should be taken up, as they are not problems of cognitive value; valuative expressions do not belong to the science. The author analyses mainly the 5th opinion. It can be understood in three ways: as a summary of an actual development stage of the science; as a methodological thesis being a component of some methodological model of a science, and as a directive addressed to scientists and recommending them to eliminate valuations from their science. In every of the above meaning the 5th opinion is to be rejected. In the interpretation it is a trivial falsehood, in the interpretation it is ineffective as a guide line of an action, and in the interpretation it assumes an inadequate reconstruction of a science, for it is possible to carry out such a reconstruction which would make possible an occurring of valuations in the science which do not lose anything of their adequacy in other respects. Designing such a reconstruction the author takes as a point of departure a distinction between objective valuations and purely expressive valuations. The former may be used as scientific assumptions and the latter – being deprived of logical value – only as criteria in the choice of problems. It is evident, however, that the sole existence of valuations in a role of scientific assumption does not disturb a realization of the paramount aim of scientific investigations, i.e. resolutions of problems formulated by the scientists. This can only take place when some additional conditions are fulfilled which the author is trying to formulate in a general way.