  Within the de Broglie-Bohm (dBB) theory, the measurement process and the
determination of its outcome are usually discussed in terms of the effect of
the Bohmian positions of the measured system S. %} This article shows that the
Bohmian positions associated with the measurement apparatus M can actually play
a crucial role in the determination of the result of measurement. Indeed, in
many cases, the result is practically independent of the initial value of a
Bohmian position associated with S, and determined only by those of M. The
measurement then does not reveal the value of any pre-existing variable
attached to S, but just the initial state of the measurement apparatus. Quantum
contextuality then appears with particular clarity as a consequence of the dBB
dynamics for entangled systems.
