All rational agents converge on mathematical and ontological facts, by definition.
Only by a definition whereby “rational” means “ideally rational”. In the ordinary sense of the term, it perfectly possible for someone who is deemed “rational” in a more-or-less, good-enough sense to fail to understand some mathematical truths. The existence of the innumerate does not disprove the objectivity of mathematics, and the existence of sociopaths does not disprove the objectivity of morality.
If you admit that at least one of all possible rational agent doesn’t converge upon morality,
Do you believe that it is possible for a rational agent to fail to understand a mathematical truth? Because that seems rather commonplace to me. Unless you mean ideally rational....
The whole point of invoking an ideal rational agent in the first place was to demonstrate that moral “truths” aren’t like empirical or mathematical truths in that you can’t discover them objectively through philosophy or mathematics (even if you are infinitely smart). Rather, moral “truths” are peculiar to humans.
If you want to illustrate the non-objectivity of morality, then stating that even ideal rational agents won’t converge on them is one of expressing the point, although it helps to state the “ideal” explicitly. However, that is still only the expression of a claim, not the “demonstration” of one.
Only by a definition whereby “rational” means “ideally rational”. In the ordinary sense of the term, it perfectly possible for someone who is deemed “rational” in a more-or-less, good-enough sense to fail to understand some mathematical truths. The existence of the innumerate does not disprove the objectivity of mathematics, and the existence of sociopaths does not disprove the objectivity of morality.
Do you believe that it is possible for a rational agent to fail to understand a mathematical truth? Because that seems rather commonplace to me. Unless you mean ideally rational....
I did mean ideally rational.
The whole point of invoking an ideal rational agent in the first place was to demonstrate that moral “truths” aren’t like empirical or mathematical truths in that you can’t discover them objectively through philosophy or mathematics (even if you are infinitely smart). Rather, moral “truths” are peculiar to humans.
If you want to illustrate the non-objectivity of morality, then stating that even ideal rational agents won’t converge on them is one of expressing the point, although it helps to state the “ideal” explicitly. However, that is still only the expression of a claim, not the “demonstration” of one.