I had been unaware of this work, though it presaged more recent works in cognitive science that put the intuitions on a reasonably firm scientific footing at least in principle.

Do you know to what extent this work was actually influential? It seems to me that a lot of post-Wittgenstein philosophy trundled along pretty much independent of any ideas about whether there could be an objective way to define our meaning and the truth of our statements about internal states, like pain, and about social norms, like rudeness. The analytic side seems to have carefully dropped some of the I-have-a-hammer-so-only-nails-are-good-problems attitude of many of the positivists, and the non-analytic side seems to have given up on any useful notion of objectivity.