wh-question ("nothing"). Need semantics 
 to handle this.<br>
   &nbsp; - "(You want to drink) A soda." as feedback adds a y/n question 
to  QUD, but also the wh-question "What do you want to drink"; this enables 
corrections  not preceded by "no", e.g. "juice!"<br>
   </blockquote>
      
<p><b>* "bind(Q)" action - [SL 030520-1]</b><br>
   </p>
     
<blockquote><b>x</b> opposite of protect; makes Q available for accommodation 
 but will not result in asking Q <br>
     <b>-</b> "real" questions have prior