Re: the True and the Good and the Rational

Your conclusion sounds entirely reasonable.

But doesn't it imply that various definitions of rationality could be
correct as long as they don't contradict the bedrock a priori assumption?
(The assumption of preservation of the human species, that is.)

In other words, "preservation of the species" is so broad, can't it
contain a myriad of legitimate sub-categories of rationality?

RH