 What Kripke means by this comparison with a Humean problem is that Wittgenstein is questioning the nexus between a past act of meaning and subsequent practice in a way analogous to that in which Hume questions the causal nexus between a single past event and a subsequent one. And what he means by a Humean solution is that there is a corresponding analogy between the ways in which Hume and Wittgenstein handle their respective problems. Kripke’s view is that, just as Hume says, in effect, “Unique causation is unintelligible; A’s causing B consists in A’s being embedded in a pattern of the following of A-type-events by B-type-events which inclines us to assert that A caused B”, so, comparably, Wittgenstein says, in effect, “Unique meaning is unintelligible; rather, someone’s meaning the usual addition function when saying ‘plus’ consists in their being considered by a community to have passed the community’s test for employing that function.”