Full Idea
Induction cannot establish the universal by means of the particular, since limited particulars may omit crucial examples which disprove the universal, and infinite particulars are impossible to know.
Gist of Idea
If you don't view every particular, you may miss the one which disproves your universal induction
Source
Sextus Empiricus (Outlines of Pyrrhonism [c.180], II.204)
Book Reference
Sextus Empiricus: 'Outlines of Pyrrhonism', ed/tr. Bury,R.G. [Prometheus 1990], p.164