1. Leksička semantika i pragmatika 6. predavanje

2. Headlines Police Begin Campaign To Run Down Jaywalkers Iraqi Head Seeks Arms Teacher Strikes Idle Kids Miners Refuse To Work After Death Juvenile Court To Try Shooting Defendant LING 2000 - 2006 NLP2

3. Kinds of knowledge needed? Consider the following interaction with HAL the computer from 2001: A Space Odyssey Dave: Open the pod bay doors, Hal. HAL: I’m sorry Dave, I’m afraid I can’t do that.

4. Knowledge needed to build HAL? Speech recognition and synthesis –Dictionaries (how words are pronounced) –Phonetics (how to recognize/produce each sound of English) Natural language understanding –Knowledge of the English words involved What they mean How they combine (what is a `pod bay door’?) –Knowledge of syntactic structure I’m I do, Sorry that afraid Dave I’m can’t

5. What’s needed? Dialog and pragmatic knowledge –“open the door” is a REQUEST (as opposed to a STATEMENT or information-question) –It is polite to respond, even if you’re planning to kill someone. –It is polite to pretend to want to be cooperative (I’m afraid I can’t…) –What is `that’ in `I can’t do that’? Even a system to book airline flights needs much of this kind of knowledge

6. Eliza: Weizenbaum (1966) User: You are like my father in some ways. ELIZA: What resemblance do you see User: You are not very aggressive but I think you don’t want me to notice that. ELIZA: What makes you think I am not aggressive User: You don’t argue with me ELIZA: Why do you think I don’t argue with you User: You are afraid of me ELIZA: Does it please you to believe I am afraid of you