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[[John F. Sowa]]'s '''Conceptual Graphs''' allow the graphical statement of [[logic]] [[proposition]]s, or [[predicate]]s. Like the [[Unified Modeling Language]], they allow construction of statements such as

*"[[England]] expects that every man will do his [[duty]]". -- [[Horatio Nelson]]

External Link: [http://www.jfsowa.com/cg/cgexamp.htm]

Sowa credits the '''Existential Graphs''' of [[Charles Sanders Peirce]] for his conceptual graphs. See also [[conceptual schema]], [[semantic network]], [[knowledge representation]]. Together with concepts like [[principal components analysis]], [[Tuevo Kohonen]]'s [[self-organizing map]] and [[Bayesian inference]], Sowa's conceptual graphs may eventually make it possible to implement [[artificial intelligence agent|agent]]s for [[unsupervised learning]].

Reference: John F. Sowa, ''Conceptual Structures'' [[1984]] IBM Systems Programming Series ISBN 0-201-14472-7

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====References====
* Adapted from the [[Wikipedia]] article, "Conceptual_graph" [http://en.wikipedia.org/wiki/Conceptual_graph http://en.wikipedia.org/wiki/Conceptual_graph], used under the [[GNU Free Documentation License]]