Sentence:  Consider the case of <WSD>expressives</WSD>, where no prior knowledge of the speaker's attitudes are required to interpret the utterance. In (43) ["That jerk Alexa keeps making me look bad"], Steve does not need to know (and in fact has no prior knowledge of) anything relating to Siri's attitudes towards Alexa to interpret that Siri has a negative attitude about Alexa. It is the <WSD>expressive</WSD> "that jerk" that implies the negative attitude. 
Meaning of the word marked with <WSD> tags:  Any word or phrase that expresses (that the speaker, writer, or signer has) a certain attitude toward or information about the referent.