1. In astrophysics, the elements consist of: Hydrogen, Helium, and Metals. (The relative abundance of elements in the cosmos being something like: Hydrogen 95%, Helium 4%, and Everything Else, 1% — thus, the "everything else" category is lumped under a single name.)
2. "The most common elements in the universe are hydrogen and stupidity" — Harlan Ellison.
It therefore follows that stupidity is either Helium, or Metal. We can test the former option by saying saying "Helium is stupid" — which, on the face of it, is pretty damn stupid. Which leads me to conclude that the other possibility is the only reasonable one. Stupidity is clearly Metallic.
(Unless it's dark matter.)
In next week's thrilling episode we examine: how many angels can dance on the head of a pin, and on the basis of this observation, whether divine beings are Bosons or Fermions.