Rational thought is well founded in the survival imperative from which springs the tradition of 'morality' and 'faith'.
BUMP
. . . but it cannot be conducted except within a language. The immature brain has specialized neural nets which facilitate the learning of language(s) by children.Computers, even with the most sophisticated AI, do not understand "natural language" because such a language is part of human tradition and can be learned in no other way than by human tradition. Computers will have to be ordered very differently than at present to attain the language learning ability of blind, deaf mute humans.
Nor can rationality transcend that limitation.