Abstract

By means of an ecological and system theoretic example it is argued, that the methodological principle of repeatable effects is only partially valid. In 1970 a conjecture of system's properties was published which was refuted later, but further research was initiated in different fields, just because it referred to a non-repeatable "false" result. The heuristic content of a concept seemed to be more important than a successful replication of an experiment. The case study exhibits the restricted validity of general methodological rules