|Phenomena and Concepts|
We will now study concepts and phenomena, in order to get inspiration and guidance to our understanding of classes and objects.
These are the definitions of 'phenomenon' and 'concept'. I have taken these from the PhD thesis of Jørgen Lindskov Knudsen and Kristine Stougaard Thomsen, Aarhus University. The thesis was published in the mid eighties.
A concept is characterized by its name, its intension (= characteristic properties), and its extension (= the phenomena covered by the concept).
Please pay attention to these words!