  The six books of M I–VI, taken together, constitute an attack on the liberal arts. For their general aim, see Barnes 1988. The most important feature of M I–VI, which can be misleading, is that in them, there is often the appearance of negative dogmatism, i.e., of claims that this or that art doesn’t exist. Take for example M I 90: ‘So let this stand to show the non-existence of grammar, at least on the grammarians’ conception of it’. Bett 2018: 11–15 urges us to view such moments as traces of a previous stage of Pyrrhonism. Alternatively, rather than interpret this as occasional departures from Sextus’ over-arching plan to induce suspension of judgment (which is in any case still present in texts such as M I 6), one could take these apparent statements of negative dogmatism to be ‘the equipollent counterpoise to the technicians’ arguments’ (Blank 1998: l, summarising Barnes 1988: 72–7). (See above 4.2 for a similar story about M XI.)