Equally happy is very different from identical experiences. 11 non-diverging copies of a person is (IMO) more like one person with especially intense qualia. 11 superficially-similar people are probably not actually “the same” enough to start with declining marginal utility.
Equally happy is very different from identical experiences. 11 non-diverging copies of a person is (IMO) more like one person with especially intense qualia. 11 superficially-similar people are probably not actually “the same” enough to start with declining marginal utility.