> [1] It is quite possible to construct a value system which implies
> that immortality is a bad idea. If Hayflick's value system is of this
> type, then his conclusion is quite rational, although his stated
> reasoning is not.
This, of course, presumes that any value system is rational, which I'd say
is a highly controversial premise.
It seems to me that any definition of practical rationality must on some
level include some element which prevents one from contradicting one's
self and one's stated values. It seems to me that a death wish like
Hayflick's would therefore not meet this criterion.