“…In particular, the relevant contextual elements include both the context of utterance, that is, the so-called triple ''time, place and speaker'' [20], to which it is opportune to add also the manner of the utterance, for example, if it was uttered laughing or with a grunt, the information relative to the listener, especially about her relationship with the speaker (if they are friends or strangers or countrymen, etc., and, especially, what they know about each other), and the so-called co-text, that is, the set of adjacent utterances, the sequence in which a given utterance occurs. 8 It is important to note how, to ensure a correct understanding, the context of utterance and the co-text must be known both by the listener and by the speaker: or better still, the listener must be aware that the speaker also knows them, that the speaker knows that the listener also knows them, that the speaker knows that the listener knows that the speaker knows them and so on. In short what Schiffer termed mutual knowledge must obtain.…”