While we have our doubts about the wisdom of Pacific Gas, we have no difficulty understanding its meaning, even without extrinsic evidence to guide us.
Bam. Or, in Latin, Q.E.D. If you don't get it, go read Trident Center v. Connecticut General Life Insurance Co., 847 F.2d 564 (C.A.9, 1988).*
* I tried to get a link for Trident Center, but I couldn't find it. Good luck.