weak_transitive_plane.clif

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 * Copyright (c) University of Toronto and others. All rights reserved.
 * The content of this file is licensed under the Creative Commons Attribution-
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 * Contributors:
 *    Michael Gruninger - initial implementation
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(cl-text http://colore.oor.net/tripartite_incidence/weak_transitive_plane.clif

(cl-imports http://colore.oor.net/tripartite_incidence/weak_tripartite.clif)

(forall (x y z)
	(if	(and	(plane x)
			(line y)
			(point z)
			(in z y)
			(in y x))
		(exists (w)
			(and	(in z w)
				(plane w)))))

)