Summary In the first part of this contribution, the three probably most influential conceptions of evolutionary epistemology are surveyed, as they were put forward by Konrad Lorenz, Gerhard Vollmer, and Rupert Riedl, respectively. It is demonstrated that, as far as the essentials are concerned, these conceptions largely correspond with each other as well as with a further conception advanced by Karl Popper from the point of view of Critical Rationalism. It can be clearly shown, moreover, that fundamentals of the latter (...) conception can be traced back to Popper's earliest publications (e. g., to hisLogik der Forschung [The Logic of Scientific Discovery]). By means of an examination of the language used by these authors, it is tried to elucidate the fact that, for the reasons of lacking consideration of the lingual/non-lingual distinction and of faults and inadequacies in consequence of this lack alone, the proposed conceptions can be rejected as being at least highly defective. (shrink)