6.31 The so-called law of induction cannot in any event be a logical law, since it is clearly a meaningful [sinnvoller] proposition. – And therefore it also cannot be an a priori law.

So it’s really no law at all. But, as Black (p. 345) says, “Which ‘law of induction’ did W. have in mind? Perhaps, with echoes of Aristotle, one allegedly permitting an inference from ‘Some A’s are B’ to ‘All A’s are B’?”