 Does the ruling out of memory-scepticism as irrelevant to the private language argument mean that two associated Orthodox objections to it are likewise irrelevant? The first of these is that the argument, self-defeatingly, rules out a public language as well. The second relies on the ‘community view’ interpretation: it is that the argument, equally self-defeatingly, rules out as impossible something perfectly conceivable: namely, the case of a so-called ‘Robinson Crusoe’, a human being who, unlike Defoe’s original Crusoe, is isolated from birth but devises a language for his own purposes without his having first been taught another language by someone else. Wittgenstein’s Orthodox defenders, faced with this second objection, looked to be on shaky ground, often being forced into the position of conceding that the argument did indeed exclude the case, but claiming (not very plausibly) that such a Crusoe is after all impossible so that the concession was not damaging.