4. The method of claim 1 , further comprising ordering the plurality of possible pathways by ordering pathways having a many-to-one link between pathway nodes, whereby pathways having at least one many-to-one link are ordered for earlier examination than pathways having equal link counts and no many-to-one links.
4. The method of claim 1 , further comprising ordering the plurality of possible pathways by ordering pathways having a many-to-one link between pathway nodes, whereby pathways having at least one many-to-one link are ordered for earlier examination than pathways having equal link counts and no many-to-one links. 6. The method of claim 4 , further comprising ordering the plurality of possible pathways by ordering pathways having more than one many-to-one links between pathway nodes, whereby pathways having more many-to-one links are ordered for earlier examination than pathways having equal link counts and fewer many-to-one links.