As spawned from the DefinitionOfOrthogonal,

	* Urgency vs. Importance. See FourQuadrants for application of this.
	* TopDownDesign + BottomUpProgramming vs. DepthFirst + BreadthFirst.  See CloseTheLoop.
	* Open + Closed vs. Active + Inactive, when discussing minds.  See MyMindIsMadeUp.

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See also: WordsThatArentSynonyms, ComplEmentarity.