 For example: Doxastic states such as the “I am the speaker” state or the “I am fifty years old” state are extremely likely to be troublemaking if asserted on a package-delivery model, because it’s extremely likely that not all the participants in a conversation will believe truly by being in them. The fact that the speaker has the property one must have in order to believe truly by being in those doxastic states is not strongly correlated with the speaker’s addressees having it, and so it’s very likely that if these states were communicated by package delivery, a package would get delivered that the recipient ought not to accept.