Jodo Kast wrote:If immortality is indeed an abstraction and can never be real
I'm not willing to debate this much further, so I'll keep it short. In my opinion, "abstractions" are real. They are a way by which our brains/consciousnesses order reality to make it understandable and graspable to us. You seem to equate the term "real" with a simplistic physical/very rudimentary materialist definition of the word. Yet, our subjective experiences and the abstract concepts we use to order the world (time, numbers, ideas, etc.) are very real in the aspect of reality that they belong to - the subjective. Just as our subjective mind and our physical brain are two sides of the same coin, so are abstractions like numbers and the idea of immortality (for example) the subjective side of the physical processes that occur in our brains. That we can imagine something like "numbers" or "immortality" doesn't mean that they have a real physical basis "out there" - it rather means that they are the results of wishes, desires, thoughts, etc. going on "in here" (i.e. the brain). The number 5 isn't "out there" somewhere for you to find, it's physical basis is your brain and how that brain copes with and structures the reality it is embodied in. What seems to confuse many people about this is that they stick to a very narrow materialistic interpretation of the world that per definition excludes subjective phenomena, therefore they fool themselves into thinking that "if something can be thought or conceptualized as an idea, it must be out there somewhere to be found". But of course, abstractions are part of our subjective life-world (as this is realized in our physical brains), and these abstractions, ideas, ideals, etc. need not have any basis in the outside world. Or would you argue for the existence of for example God just from the notion that some people have an idea that God exists? Some people throughout history have argued that , but then again, those people were convinced Christians preaching to the choir, that argument doesn't sound very convincing to more secular ears. And likewise, an idea of immortality doesn't necessarily entail that immortality can ever be attained or that it exists "out there somewhere". Its a wish/desire/idea born from our brain processes, realized in our minds.
Sorry, I tried to keep it short. >_< Also, my apologies if it sounds like I'm lecturing, I'm just expressing my opinions/views.
Edit: I also agree with you that it is very possible that immortality might one day become a reality, and that a lot of research is being conducted in that direction. What is "real" about immortality right now is that it exists as a conception in our minds that we can decide to work towards. But calling that abstraction (the idea we have of immortality) "not real"is incorrect - it exists in our minds, and our minds very much exist. What happens if that abstraction is one day realized is that we have brought about a change in another sphere of the physical world than only our brains/minds, we have realized it in "independent" practice by developing the technology. I don't think you can say that the abstraction of immortality "leaks" into the real world, because reality is per definition all that exists, and that includes the abstractions we have only in our minds.