Advisor: The brain regions in this database work on a nearest neighbor rule. ...
A: In my head: Nearest neighbor. Easy. But wait! Boundary conditions...
Advisor: To get the boundaries, though, you have to think of them as expanding soap bubbles.
A: No. No please. Anything... anything but...
Advisor: Have you ever heard of Voronoi diagrams?
A: NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
As a sidenote, do any of you happen to know of a half-decent implementation of Voronoi diagrams in 3-space?