And anyway, if we’re being charitable, Witt’s private language argument is fully locked in to this way of thinking: ‘I don’t have any idea what you’re talking about, you’re using language in your own idiosyncratic way, there’s nothing for anybody else to grasp hold of!’

I’m soooo confused. The HD method isn’t limited to logical positivists. I mean it’s a dorky way to say “wtf is your empirical evidence, my dude” in this case and the answer is entirely non responsive.

Except that Wittgenstein argued for the impossibility of a private language since there is nothing to fix the referents. (Elsewhere I’ve seen Goff approvingly quote Lewis Carroll’s Humpty Dumpty for recommending the view that we can use words to mean whatever we want!)