  I criticize the widely-defended view that the quantum measurement problem is
an example of underdetermination of theory by evidence: more specifically, the
view that the unmodified, unitary quantum formalism (interpreted following
Everett) is empirically indistinguishable from Bohmian Mechanics and from
dynamical-collapse theories like the GRW or CSL theories. I argue that there as
yet no empirically successful generalization of either theory to interacting
quantum field theory and so the apparent underdetermination is broken by a very
large class of quantum experiments that require field theory somewhere in their
description. The class of quantum experiments reproducible by either is much
smaller than is commonly recognized and excludes many of the most iconic
successes of quantum mechanics, including the quantitative account of Rayleigh
scattering that explains the color of the sky. I respond to various arguments
to the contrary in the recent literature.

Quantum Physics