  In a recent article Giustina et al. [Phys. Rev. Lett. 115, 250401 (2015)]
report on an advanced Bell experiment, simultaneously closing loopholes for
local hidden-variable theories. The authors claim that 'local realism' has been
refuted, unless 'truly exotic hypotheses' are made. Here I argue that a
particularly wide and natural class of local hidden-variable theories survives,
for instance when the hidden variables describe a background field. Such
background-based theories exploit the freedom-of-choice loophole, which cannot
be closed for this type of hidden variables. The dynamics of such models can be
illustrated by existing systems, e.g. from fluid mechanics.
