uhhmmmm
please expound re: permutation theory for the uninitiated
I'll explain it a bit in a mathematical sense.
Say you have 5 persons, and 4 doors, how many ways can each of the 5 persons enter any of the 4 doors in succession? Each possible way is called a
permutation.
Now if you have a kick, snare, two toms, a floor tom, a hihat (closed, open, semi-open or pedal kicked), a crash, a ride (bell or bow), and you've got two hands and two feet, how many ways can you fill a simple 4-4 measure? Without polyrhythms alone, you get almost infinitely many ways to do so, but doesn't mean that it would sound good in a certain musical situation.