[Merged from (the now removed) ia: organizing notions:] Wow! That's it - what I was telling since a few years. Here, at the secondary "Definition" paragraph.

The author of that page got the idea:

A concept is a set of concepts and relations between them. This is a circular definition... but nonetheless true. It's not much different than "the set of all sets" or something self-referential like that. Whenever you see something recursive like that.. something self-similar, you know you are going to be dealing with Fractals, Recursion, Self-Symmetry and ideas like that.

True, that's a recursive definition, but you run into a problem - what are the absolutely basic concepts? - Referring to fractals doesn't release you out of this problem, since you don't start somewhere in the skies of concepts, but on the ground. - But where's that ground, if you set your foundation on a recursive definition of it?


Hint: Have a look at Rudolf Wille and his research topic "notion analysis"/"concept analysis" ("Begriffsanalyse" in German).<<

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