Absolutely. I don't mean that dynamic "this" is required by prototypal inheritance in general -- I mean that it's required because of JavaScript's particular im

Absolutely. I don't mean that dynamic "this" is required by prototypal inheritance in general -- I mean that it's required because of JavaScript's particular implementation of prototypes, where they're exposed to you as a value, but there's no syntax where the language can tell that you're in the process of building one out.