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Our panel of 90 professional philosophers has responded to

Question of the day

Often with questions that are composed of multiple further questions ("Here is a question", you write . . . - it's not - I count four question marks!) it helps to take just one, and deal with it carefully, before moving on to the next. Of course some of the sub-questions will generate further questions, but that simply means that some patience is required. For example, 'I move my brain from one body to another, so I never age.' Why does it follow that you never age? If you retain your memories (line 3) and add to them, then you are changing and aging, psychologically. So you must mean that you don't physically age. But the brain does age. And why is it that 'I never age' follows from 'I move my brain from one body to another'? That seems to assume that who you are is a matter of having the same brain. Is that right? And if it is, then if as you say 'after living for a long time my brain is no longer anything like the original' then you are not after all the same person, so the question goes away. A quick thought to end, and to encourage you to continue with the problems you raise on your own, till they stop bugging you. If I sneeze, it is not the case that my brain sneezes. So I am not my brain. Questions like yours are common in the philosophy of mind, and there are lots of things to read and think about. The right place for you to start might be with fission ideas in the work of Derek Parfit. For him if I fission, the answer to the question whether I survive is indeterminate. You might also look at the entry "Personal Identity" (the section on fission) in the online Stanford Encyclopedia of Philosophy. Good luck to you, and to your brain, whichever gets there first.