Editing Chrysippus (section)

===Other logical work===
Chrysippus analyzed speech and the handling of names and terms.<ref name="davidson614"/> He also devoted much effort in refuting fallacies and paradoxes.<ref name="davidson614"/> According to Diogenes Laërtius, Chrysippus wrote twelve works in 23 books on the [[Liar paradox]]; seven works in 17 books on [[amphiboly]]; and another nine works in 26 books on other conundrums.<ref name="barnes71">{{Harvnb|Barnes|1999|p=71}}</ref> In all, 28 works or 66 books were given over to puzzles or paradoxes.<ref name="barnes71"/>
Chrysippus is the first Stoic for whom the third of the four [[Stoic categories]], i.e. the category ''somehow disposed'' is attested.<ref>Stephen Menn, "The Stoic Theory of Categories", in ''Oxford Studies in Ancient Philosophy'': Volume XVII: 1999, 215–247.</ref> In the surviving evidence, Chrysippus frequently makes use of the categories of ''substance'' and ''quality'', but makes little use of the other two Stoic categories (''somehow disposed'' and ''somehow disposed in relation to something'').<ref name="gould107">{{Harvnb|Gould|1970|p=107}}</ref> It is not clear whether the categories had any special significance for Chrysippus, and a clear doctrine of categories may be the work of later Stoics.<ref name="gould107"/>