I'm talking about something more fundamental than that -- the idea that the length of time someone has to live is determined by something as simplistic as how much "life energy" they have -- that by transferring "life energy" from one person to another, you increase one's life expectancy by X years and decrease the other's by an equivalent amount. As if we were all born with a fixed amount of "life" and it could be added to or subtracted from like gas in a tank. As if longevity and health had nothing to do with nutrition, exercise, environmental factors, stress, infection, cellular mutation, the quality of medical care, or anything else. That goes far beyond pseudoscience into something out of a fairy tale.
Correct me if I'm wrong, but I don't recall it being said anywhere that "life energy" had anything to do with the length of somebody's life. In fact, I'm particularly recalling that Franklin compared the possibility of using the alien healing device in the same way that blood can be donated. Blood is renewed/replaced after being donated although losing too much of it will cause death, just as having your life energy drained as Marcus did caused death.
Jan
Exactly. The device, though a little vague (which is fair enough, since they didn't even know where it came from, much less why it worked) transferred energy from one life-form to another. Ivanova didn't get the remaining years from Marcus, she got the sum total of energy in his body at the time, which the machine used to repair her injuries. Like a jump start. Lorien's "20 years" was something else, though there was an "energy transfer", it was basically his doing the best that he could with what was essentially a cadaver from a species he'd never encountered before. The fact that he managed to restore him at all demonstrates just how powerful he really was. Hell, if he had a mind to, I'm sure he could potentially have wiped out all the remaining First Ones himself.
^I disagree. There could easily have been an equally simple but less idiotic way of handling the medical stuff than "life energy transfer." Hell, having no explanation whatsoever would've been a vast improvement over that.
Well that's more or less what we got. Franklin's explanation was just a rough idea based on observation of the medscanner's reading of a patient during the process. That doesn't mean he has the first clue as to the mechanics of it. Indeed, in the case of the machine, it took nothing short of 500 years and the discovery of the planet the device came from to understand it enough to revive Marcus.
In the case of Lorien's life extension, after 20 years as head of xenobiology, curing the Drakh plague and several years out on the rim with G'Kar Franklin still had no clue how that worked.
The point is, both of these were exceptional circumstances using alien tech so advanced it make nanites look about as sophisticated as a flint axe. So long as it's used consistently and not as a pure deux ex tech that would instantly disappear, never to be mentioned again *cough*Star Trek*cough* I don't see a problem with it.