 Most philosophers, however, have rejected hedonistic and other mental state accounts of well-being, and with them the idea that happiness could suffice for  well-being.[24]  (See the entry on  well-being.)  Objections to mental state theories of well-being tend to cluster around two sets of concerns. First, it is widely believed that the non-mental conditions of our lives matter for well-being: whether our families really love us, whether our putative achievements are genuine, whether the things we care about actually obtain. The most influential objection of this sort is Robert Nozick’s experience machine case, wherein we are asked to imagine a virtual reality device that can perfectly simulate any reality for its user, who will think the experience is genuine (Nozick 1974). Would you plug in to such a machine for life? Most people would not, and the case is widely taken to vitiate mental state theories of well-being. Beyond having positive mental states, it seems to matter both that our lives go well and that our state of mind is appropriately related to how things   are.[25]