215) If you travel in time, do not try to 'inspire' past people to make sure Maho Sensei Negima become a reality.
207c) And Q, the reason for this rule was a suggestion of yours: last time, your wife has become... creative... and you've asked us to make the rule 207, before erasing your own memory of the fact. By the way, <a href='http://tvtropes.org/pmwiki/pmwiki.php/Main/NoodleIncident' target='_blank' rel='nofollow'>That Incident Has Never Happened</a>, has you have asked.