LW is quoted (in a kind of flattering way) in Simon Dedeo’s awesome piece on the last Nautil.us issue. For spoiler lovers:
[...] Rationality is my ticket out. The only reason I can trust you is that you seem rational enough to talk to. But now you’re telling me that rationality is just a layer on top of the System—it’s just as irrational as the people I’m trying to escape. I don’t know which is worse: being duped by someone else’s priors, or being a biological machine.
Teacher: Don’t go too far. You’re a smart kid—you can iterate faster than most. You can match patterns better. Evolution set you up well. You’ll get better at predicting the consequences of your actions, and better at adapting your environment to your will. Rationality is systematized winning.
Ian: It’s not winning I’m worried about. It’s my mind. Maybe it’s silly, maybe it’s a fetish, but I want to know the truth. It’s the principle of the thing. Wanting to know the truth got me this far, but now the only option you’ve given me is believing in something I can’t see. If I know it at all, it can’t be through rational, scientific calculation. There’s some kind of extra-rational process I have to engage in—but what’s beyond the edge of reason?
Teacher: Many things. Dreams, intuition, transcendence, love, ascending the ladder, repetition and the leap of faith, philosophy itself …
Ian: … delusion, fairy tales, fascism!
Teacher: Childhood’s end.
My concern, which I interpret as being TAG’s point (but with different words), is that your example of water vs. XYZ is immediately traceable (at least for anyone who knows the philosophical discussion) to Putnam’s Twin Earth experiment. The way you express your point suggests you disregard this thought experiment—which is surprising for someone acquainted with it, because Putnam (at least when he wrote the paper) would likely agree that a substance with the same basic chemical properties of water would be water. He actually aims to provide an argument for semantic externalism—i.e., the idea that the meaning of “water” (or of other natural species) is H20, its chemical nature, and not the apparent properties commonly used as criteria to discriminate it (that it’s a tasteless liquid...). He’s so pushing against a conventionalist view about semantics (and philosophy of language), thus it’s not about physics or ontology.