Rationality requires intelligence, and the kind of intelligence that we use (for communication, progress, FAI, etc.) runs on language.
It seems that the place we should start is optimizing language for intelligence and rationality. One of SIAI's proposals includes using Lojban to interface between humans and an FAI. And of course, I should hope the programming language used to build a FAI would be "rational". But it would seem to me that the human-generated priors, correct epistemic rationality, decision theory, metaethics, etc. all depend on using a language that sufficiently rigorously maps to our territory.
Are "naturally evolved" languages such as English sufficient, with EY-style taboos and neologisms? Or are they sick to the core?
Please forgive and point me towards previous discussion or sequences about this topic.
I don't want to sound disrespectful towards your efforts, but to be blunt, artificial languages intended for communication between people are a complete waste of time. The reason is that human language ability is based on highly specialized hardware with a huge number of peculiarities and constraints. There is a very large space for variability within those, of course, as is evident from the great differences between languages, but any language that satisfies them has roughly the same level of "problematic" features, such as irregular and complicated grammar, semantic ambiguities, literal meaning superseded by pragmatics in complicated and seemingly arbitrary ways, etc., etc.
Now, another critical property of human languages is that they change with time. Usually this change is very slow, but if people are forced to communicate in a language that violates the natural language constraints in some way, that language will quickly and spontaneously change into a new natural language that fits them. This is why attempts to communicate in regularized artificial languages are doomed, because a spontaneous, unconscious, and irresistible process will soon turn the regular artificial language into a messy natural one.
Of course, it does make sense to devise artificial languages for communication between humans and non-human entities, as evidenced by computer programming languages or standardized dog commands. However, as long as they have the same brain hardware, humans are stuck with the same old natural languages for talking to each other.
A word language constructed from scratch based purely on what the creator thinks superior would indeed fall prey to your criticisms, but there a third possibility between a totally natural and totally artificial language. For lack of a better term, I'll call it a cultivated language. That is, a language built up out of real efforts to communicate for practical purposes, but with deliberate... (read more)