 The third chapter of the Syncategoreumata discusses the exclusive words solus and tantum. They are called exclusives because they carry out an exclusion, not because they signify one. An exclusion, furthermore, requires four things, namely, what is excluded, what is excluded from, the respect in which it is excluded, and the act of exclusion. The kinds of exclusion are divided into general and specific: the former involves an exclusion from something generic, whereas the latter from something specific. Questions that come up in this section have to do with the results of adding an exclusive term to different kinds of words, such as to a term falling under the category of Substance: does it exclude only other substances, or does it also exclude from things listed under another category? And what if it is added to a term listed under the category of Accident (such as colour, quantity, and so on)? The next question deals with the sorts of terms that can be meaningfully associated with an exclusion. For example, is it possible to exclude something from ‘being’ (as in ‘Only being is, therefore nothing other than being is’)? The tract proceeds with the kinds of things that can qualify for an exclusion. The fourth chapter, which deals with exceptive words, is compiled in a similar manner.