I think the difference of opinions is based more on the variables not being stricktly defined. To me a "full" fish means he is stuffed with food, natural or other wise. To me this fish will be less motivated to hit a lure due to hunger. A well fed fish (not completely stuffed) will be healthy and have energy and motivation to feed more. A hungry fish ( lack of nutrition) will probably want to feed but might not have the energy to chase food, or compete with other healthier specimens. Now that being said, hunger is only one of several factors that cause fish to hit lures. Curiosity, reflex reaction to fleeing prey, territorialness (is that a word?), and competition are other factors that cause fish to "strike" not necessarily eat a lure. Just my $.02
Very interesting topic guys keep it up!!!