>> You're missing the point that some cells, essential to our survival, are never replaced, and when they decay, we die.
> These cells can be replaced via stem cell therapy ...
Brain cells replaced by stem cell therapy? Have you given this any thought? A brain cell replaced by stem-cell therapy is empty -- it's not a replacement for the cells that contain the memory of your fifth birthday party, or that contain your knowledge of Calculus.
There's a reason brain cells aren't replaced -- it's the same reason you can't swap a running hard drive for a replacement that has no data written to it.
> "age" is not an abstract thing that kills you.
No, not abstract -- apoptosis is not abstract, it is a fact of life. And we have a very poor understanding of it.
> Are you saying that Alzheimer's disease and heart disease and going blinde and getting fat and losing your muscles and sex drive are good things?
Only you said that, and the remainder of your post relies on an argument only you have made.
> but you don't think we can cure the diseases of aging, so you find excuses for why they are actually good.
1. Stop making arguments for other people.
2. Learn the science. You have suggested stem cell therapy to replace brain cells, but without asking yourself what brain cells do, how they function. You would do well to learn that first.
> Brain cells replaced by stem cell therapy? Have you given this any thought? A brain cell replaced by stem-cell therapy is empty -- it's not a replacement for the cells that contain the memory of your fifth birthday party, or that contain your knowledge of Calculus.
Maybe if you replaced all cells at once or something stupid like that, but that's not what is being suggested here.
> No, not abstract -- apoptosis is not abstract, it is a fact of life. And we have a very poor understanding of it.
You have a poor understanding of it. First of all, a lot of the diseases of aging come about because apoptosis stops working and these malfunctioning zombie cells hang around and gum things up and produce erroneous signals/proteins. Rejuvenating the apoptosis process is part of the SENS platform. Cells that commit apoptosis are replaced all through your life.. It's when that process stops working well that things go wrong; they don't go wrong because of that process.
In other words, apoptosis doesn't make us old, it keeps us young. It's when it stops working well - along with other things - that we get frail and sick.
I asked you questions, and you didn't answer them.
> 2. Learn the science. You have suggested stem cell therapy to replace brain cells, but without asking yourself what brain cells do, how they function. You would do well to learn that first.
Have you read Aubrey de Grey's book? It goes quite deep into the biology of his proposals (and he cites the papers that go even deeper). If you haven't, you don't even know what is being proposed so how can you know if it makes sense or not?
> These cells can be replaced via stem cell therapy ...
Brain cells replaced by stem cell therapy? Have you given this any thought? A brain cell replaced by stem-cell therapy is empty -- it's not a replacement for the cells that contain the memory of your fifth birthday party, or that contain your knowledge of Calculus.
There's a reason brain cells aren't replaced -- it's the same reason you can't swap a running hard drive for a replacement that has no data written to it.
> "age" is not an abstract thing that kills you.
No, not abstract -- apoptosis is not abstract, it is a fact of life. And we have a very poor understanding of it.
> Are you saying that Alzheimer's disease and heart disease and going blinde and getting fat and losing your muscles and sex drive are good things?
Only you said that, and the remainder of your post relies on an argument only you have made.
> but you don't think we can cure the diseases of aging, so you find excuses for why they are actually good.
1. Stop making arguments for other people.
2. Learn the science. You have suggested stem cell therapy to replace brain cells, but without asking yourself what brain cells do, how they function. You would do well to learn that first.