There's a fundamental theorem of algebra, calculus, linear algebra, and (my personal favorite) Galois theory. I've even written my own fundamental theorem--the fundamental theorem of graphics. (That one was tongue-in-cheek, but today's is serious.)
Today, on the eve of Christmas, I write to tell you of my newest derivation--the fundamental theorem of gift wrapping. I am not well versed in the abstract ideas of gift wrapping and I don't have much experience in wrapping gifts. I do, however, have experience in opening gifts. The theorem is stated without proof (okay, I guess it's only a conjecture), but comes primarily from my experience as a gift opener.
First, a definition:
The elements of each present can be divided into two sets: the gift and the wrapping paper. Define the two elements as separable if and only if the wrapping paper is not taped directly to the gift.
Now the theorem:
The measure of utility derived from a separable present is strictly greater than the measure of utility derived from a present that is not separable, ceteris paribus.
For the lay reader who has (like me) not finished their Christmas wrapping, an application:
If you want people to like their presents even more, don't tape the wrapping paper directly to the object given.
Do you have other wrapping tips? Does anyone have a more fundamental theorem of gift wrapping?