claim: Cordilleran Ice Sheet is made up mostly of snow.
evidence: Elitzur 's theorem is a theorem in quantum and statistical field theory stating that local gauge symmetries can not be spontaneously broken .. theorem. theorem. quantum. Quantum field theory. statistical field theory. statistical field theory. gauge symmetries. Gauge theory. spontaneously broken. Spontaneous symmetry breaking. The theorem was proposed in 1975 by Shmuel Elitzur , who proved it for Abelian gauge fields on a lattice .. theorem. theorem. Shmuel Elitzur. Shmuel Elitzur. Abelian. Abelian group. lattice. Lattice gauge theory. It is nonetheless possible to spontaneously break a global symmetry within a theory that has a local gauge symmetry , as in the Higgs mechanism .. Higgs mechanism. Higgs mechanism