In answer to the first question, the reason that the Buggers did not realize that we were intelligent was because the Buggers are a collective consciousness, kind of like the Borg. They could not conceive of individual beings as intelligent. Also, the ****** queens communicated telepathically. Because they couldn't hear us, they assumed that we could not be intelligent.<br /><br />As to the second question, I can't seem to remember the answer off of the top of my head. However, if I were the buggers, after realizing what I had done, I would have no choice but to take the humans out preemptively because if I didn't then they would eventually come after me.<br /> <div class="Discussion_UserSignature"> <p> </p><p><em>So, again we are defeated. This victory belongs to the farmers, not us.</em></p><p><strong>-Kambei Shimada from the movie Seven Samurai</strong></p> </div>