Perspective.
This is the trump card to any battle of opinions that an undergraduate is losing: "Well, that's your Perspective." And as far as the undergraduate's words go, s/he is absolutely right. But such accurate words usually mask an inner resolve to deny the validity of her/his opponent's opinion. The undergraduate is rarely as interested in understanding another's Perspective as s/he is in having his/her own Perspective understood.
I think there's an undergraduate in all of us.
A happy byproduct of zen practice is the realization of Perspective, especially one's own. When this realization first strikes, it can be frightening. (Zen reveals some pretty subtle things, so for simplicity's sake, we'll