Physical Immortality

Psychic immortality is proven by our experience: we've all met ghosts whether we wanted to or not and most of them have proven to be our other selves; but what about physical immortality?
Well, it's possible; but not probable. IPS are induced pluripotent stem cells taken from the skin of a patient, treated with genes and proteins to reprogram them into other kinds of cells (this makes them pluripotent), and injected back into the patient. At most, humans live to 115, but any at that age are both decrepit and incoherent---both. It is possible, with IPS treatments, for people to regenerate dying organs and tissues, as this has already been done successfully. The problem is the expense. IPS injections are prohibitively expensive and only for the very rich. However, the cost of the injections will decrease. For instance, in New York State, $600 million is being spent by New York State Stem Cell Foundation mainly through SUNY for IPS research. What this research means is that, eventually, immortality may be possible, if not probable; but longevity will be for the rich at the beginning and not for everyone. As IPS research grows, and its advantage is that injections are not rejected by the patient's immune system, availability of IPS will grow and people will be living much longer lives and perhaps, even lives of immortality.