It may soon be possible for neurotechnology to connect two subjects' brains such that they share a single token mental state, such as a feeling of pleasure or displeasure. How will our moral frameworks have to adapt to accommodate this prospect? And if this sort of mental-state-sharing might already obtain in some cases, how should this possibility impact our moral thinking? This question turns out to be extremely challenging, because different examples generate different intuitions: If two subjects share very few (...) mental states, then it seems that we should count the value of those states twice, but if they share very many mental states, then it seems that we should count the value of those statesonce. We suggest that these conflicting intuitions can be reconciled if the mental states that matter for welfare have a holistic character, in a way that is independently plausible. We close by drawing tentative conclusions about how we ought to think about the moral significance of shared mental states. (shrink)

I analyse six different senses in which a conscious mind can be said to be either 'bounded' or 'unbounded', and evaluate how well they might capture what people mean when they say either that human consciousness is necessarily bounded, that it introspectively appears bounded, or that mystical and psychedelic experiences remove its apparent boundedness. I then argue that, although human consciousness is certainly bounded in one important sense (informational boundedness), this does not entail that it is phenomenally bounded, in the (...) sense of being divided into separate fields of experience. In fact, if panpsychists are right that consciousness is fundamental and nature is uniform, it is likely that human consciousness is phenomenally unbounded: the whole universe is likely to be a single field of consciousness, with each of us being an informationally dense region of it. I close by noting some ways that this claim of phenomenal unboundedness ('continuism') impacts debates among panpsychists about how to solve the combination problem. (shrink)