 That it is the “uncertainty” suffix šaa which is responsible for the disjunctive interpretation is evidenced by the fact that if omitted the interpretation of the sentence becomes conjunctive (Gil 1991). The close connection between linguistic disjunction and uncertainty (or ignorance) will be further scrutinized in the following sections. Let us now turn to languages which do have specialized disjunctive words like or. A first difference between logical disjunction (\(\vee\)) and disjunctive words in human languages is that while the former is a binary operator, there is no theoretical finite limit to the number of units that the latter can join. Another striking difference is that while logical disjunction is a sentential operator, linguistic disjunction is typically cross-categorial. For example, English or can coordinate expressions of different syntactic category as illustrated below, where the units are noun phrases in  (20a)  and verb phrases in  (20b):