[gridlock]

So Lisa is PC. Are we to deny that PC people are out there? I think Lisa's political inclinations work wonderfully, because she is so smart but makes such obvious mistakes.

And remember, Marge likes guns...

[escapefromboston]

Its not that Lisa is PC, its that she isn't a funny character. She is okay as a supporting character but when she takes center stage the episode is usually boring.

Their really is no reason why they couldn't have a funny Lisa based episode, but they generally aren't very good.