Gaffer Tape said:
Spock spelled "principle" wrong.
Mm... I don't think so. The "principle lesson" is a lesson on a principle. The "principal lesson" is the main one you should learn, and may or may not be about a principle. Principally, and on principle, I believe Spock did intend "principal" and not "principle".
And then the DSIV blows up!
THE END.