Lots of information impinges on my brain, and my brain decides which information it will consider part of my self and which information it won’t consider part of my self, and which information—say, the cry of an offspring—falls somewhere in between. And I take it for granted that those decisions comport with some deep metaphysical truth about what is I and what is other. But in fact my brain could have been wired in a different way, so that it interpreted this information differently, leaving me with a very different sense of the distinction between I and other. For example, people with a
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