The following is a high-level overview of the things covered in discussion 
on November 3, 2008.<br>

<p><b>Common Midterm errors on problems 1 and 4-</b></p>
<p><b>Constructing CFGs for CF languages</b></p>
<p><b>Context-free pumping lemma--</b> Show {w#w#w | w in {0,1}*} is not CF.</p>