I can't say I agree with everything in this article.
One way to sum up this anti-Cartesian line of thought is to say that words acquire their meanings by being used in roughly similar ways by most speakers, not by being paired off with particular experiences or objects. (If men and women consistently use "blue" in the same way on the same occasions, they automatically mean the same thing by "blue.")
I agree that words acquire their meanings in this way. All the same, however, once words are acquired in this way they do
go on to be paired off with particular experiences or objects.
For instance, if men and women consistently use "blue" in the same way on the same occasions, then they mean the same
objective thing by blue (in this case, they have agreed to call light of so-and-so wavelength "blue"). But this is just a behavioristic account of language. Once the word "blue" has been acquired, it is indeed 'paired off' with the individual's conscious perception of blueness.
But one individual's conscious perception of blueness can (in principle) differ from another's. So although objectively/behavioristically two such speakers would 'automatically mean the same thing by "blue",' in actuality they would be associating the word with different internal conscious perceptions. If one could perceive directly what the other experienced as 'blueness,' he would certainly not say that this other person meant the same thing by "blue." (He would say, for example, "that's not blue, that's green!")
I realize that this is exactly what this Davidson fellow argued against, and that this article can't really capture his philosophy in any depth. But the above points seem so obvious as to be incontestable. This theory of language looks to me suspiciously like a simple behavioristic account that denies the existence or importance of conscious states.
In a famous article of 1974 titled "On the Very Idea of a Conceptual Scheme," Davidson explained why we did not have to worry about another familiar science-fiction suggestion: that an advanced civilization, flourishing in a faraway galaxy, might wield concepts that are forever beyond our grasp, concepts entirely incommensurable with our own. The reason is that every language, even the most advanced, has to get its start as a set of behavioral responses to stimuli, responses that can be correlated with our own responses. So there is no such thing as an unlearnable language.
Once again, I have to say 'hogwash!' Same behavioristic symptoms as above. It's easier to recognize the flaw by inverting the situation. Imagine that we meet another intelligent form of life, and assume that this life form has absolutely no emotional analog of 'shame.' They can certainly learn much of our language, and even learn the behavioristic indicators of human shame, but this race can
never really grasp what it feels like for a human to be in shame. This is precisely because they do not have the proper internal emotion to 'pair off' with the word 'shame,' once they have acquired a rough understanding of it in the objective/behavioristic sense.