How Private Must an Objectionably Private Language Be?
Some philosophers, taking their cue from Philosophical Investigations (PI) 243-315, suppose that a private language is objectionable only when its terms refer to Cartesian mental events. Others (notably Kripke) have focused on PI 201 and the surrounding remarks about rule following, and have explicated the notion of an objectionable private language as (roughly) that of a language used by just one isolated individual unsupported at any time by any source of external or community correction and approval. I attempt to defend Kripke's account against some objections proffered by Simon Blackburn. Blackburn supposes that individuals are no worse off than communities with respect to the difficulties raised by Kripke, and argues that the "paradox" of PI 201 can be avoided by a proper understanding of extended dispositions, and by grasping the possibility of private practices. But Blackburn misconstrues what it is to go on in the "same" way in following a rule, and ignores the place of constitutive rules in practices.