 What does trusting make us vulnerable to, in particular? Annette Baier writes that “trusting can be betrayed, or at least let down, and not just disappointed” (1986: 235). In her view, disappointment is the appropriate response when one merely relied on someone to do something but did not trust them to do it. To elaborate, although people who monitor and constrain others’ behavior may rely on them, they do not trust them if their reliance can only be disappointed rather than betrayed. One can rely on inanimate objects, such as alarm clocks, but when they break, one is not betrayed though one might be disappointed. This point reveals that reliance without the possibility of betrayal (or at least “let down”) is not trust; people who rely on one another in a way that makes this reaction impossible do not trust one another.