There is an open source "concept map" platform known at Compendium available from the Open University's Knowledge Media Institute. It was invented precisely to help tame conversations in a conceptual space known as "issue-based information systems". Let me explain: Compendium is for "dialogue mapping", not "argument mapping". Dialogue mapping grew up in the fast-moving arenas of town hall planning meetings which frequently turn wicked ("over my dead body you'll put that freeway through this town"). There, the cognitive overhead of recording what is being uttered must be at an absolute minimum. Jeff Conklin invented the approach and described it in a paper about "gIBIS", and that approach eventually became the open source Java platform Compendium. As an alternative to explore this space, consider visiting http://debategraph.org/

No but if it is really sunny outside and I do some research and discover the concept of a hat. Then later when I google for a hat, I know what a hat is, and I am not confused by websites that are selling hats.

It's so bemusingly fitting that your two comments don't quite seem to agree on what exactly your argument is.

It does not follow that given a concept of a hat, you recognize one. It’s like the difference between epistemology and phenomenology.