vision (?) - [SL
nd-21]</b><br>
   <br>
   <b>X rejectProp rule produces pos*und feedback - [SL 030822-1]</b><br>
     
<blockquote>- this leads to strange behaviour if the response to the pos*und 
 feedback is other than positive or nothing. The motivation for producing 
pos*und is the general principle to produce positive FB on level n-1 when 
producing negative fb on level n; however in this case it does not work so 
well and does not seem necessary, since the negative acc-feedback usually 
contains the 