  The paradox of Wigner's friend challenges the objectivity of description in
quantum theory. A pragmatist interpretation can meet this challenge by
judicious appeal to decoherence. On this interpretation, quantum theory
provides situated agents with resources for predicting and explaining what
happens in the physical world---not conscious observations of it. Even in
Wigner's friend scenarios, differently situated agents agree on the objective
content of statements about the values of physical magnitudes. In more
realistic circumstances quantum Darwinism also permits differently situated
agents equal observational access to evaluate their truth. In this view,
quantum theory has nothing to say about consciousness or conscious experiences
of observers. But it does prompt us to reexamine the significance even of
everyday claims about the physical world.
