except one -- the fruit that gives a type of knowledge that is good and evil; the fruit of the olive tree; the only solid tree whose fruit was made specifically for regular food or every food that gives the desire to keep on knowing it.
CD7, your theory is actually very easily put to the test. The olive fruit fly,
Dacus oleae, eats only olive fruit. So we only need check to see if it is immortal. The proposal has been submitted. Am just waiting to hear back from the grant committee. (They may be a little concerned by my suggestion that this will have to be a very long term study.)