I don't think that's quite a terminal value.

Then you and I do not share terminal values. I value being "right" because it is "right". I disvalue being "wrong" because it is wrong. These are practically tautological. :)

I say this is vague and sounds true but not important.

Well... there is significance in judging the ability of an arbitrary individual from a given culture to achieve excellence in either quality by examining the availability of the other, especially when attempting to compare the 'greatness' of their achievements. But that has less to do with the hardness of the limits and more to do with the strength of correlation. (With the caveat that the correlations are only statistical; individuals can and do violate those correlations quite frequently -- a testament to how skilled human beings are at being inherently contradictory.)

The body of knowledge that today comprises cognitive science and behavioral economics is something our predecessors of a century ago did not have. I should expect, as a result of this -- should the information be widely disseminated (with fidelity) over time, to see something equivalent to the Flynn Effect in terms of what Eliezer calls the "sanity waterline". (With people like Cialdini and Ariely newly entering into the arena of the 'grand marketplace of ideas', we might see a superior result to that goal than the folks at Snopes have achieved with their individual/piecemeal approach.)