 To show that French soit-soit constructions tend to force exclusivity inferences, while French plain disjunction ou doesn’t, Spector discusses the following examples. The reply in both  (28)  and  (29)  contradicts the exclusive inference, but at the same time asserts that the first sentence is true. According to Spector, the fact that such a reply is infelicitous in  (29)  shows that the exclusive inference is obligatory in this case.