If I burst into a house and yell to all assembled, "Put on the kettle!" I have uttered an imperative English sentence, but some will probably infer that I would like to have a cup of tea or other hot beverage, while another may further surmise that I feel myself at home here, and may in fact be the occupant of this house. Yet another person present, a monoglot Hungarian, may infer only that I speak English, and so does whomever I am addressing {well, it sounds like English to her}, while somebody really in the know will be instantly informed that I have decided after all to steam open that sealed envelope and surreptitiously read the letter inside in spite of the fact that it isn't addressed to me; a crime is about to be committed. What semantic information can be gleaned from the event depends on what information the gleaner already has accumulated. Learning that somebody speaks English can be a valuable update to your world knowledge, a design improvement that may someday pay big dividends.
( Daniel C. Dennett )
[ From Bacteria to Bach and ]
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