   &nbsp; - 2nd strategy relies on dialogue plans to drive dialogue when
user  does not take intitiative<br>
   </blockquote>
      
<p><b>* y/n presupposing wh - <a name="SL_030521-1"></a>[SL 030521-1]&nbsp; 
</b><br>
   </p>
     
<blockquote>- "Do you want something to drink?" is a y/n question (?Ex.drink(X)) 
 but "presupposes" a wh-question "what do you want to drink"; both should 
be put on QUD to enable interpretation of the answer "A soda." to the y/n-question. 
 Answering "no" will also answer the 