The paper is written on the honour of Jean Piaget´s centenary. His work can be seen very heterogeneous on the first sight. He was concerned about molluscs, psychogenesis of children and the history of science. I am trying to show that what unites these different disciplines is Piaget´s ability to “perceive” epistemological problems. That makes possible to go through many disciplines and to be preciously consisted and integrated.
*Príspevok je chránený zákonom o autorskom práve a právach súvisiacich s autorským právom (autorský zákon).