michaelhoney comments on Welcome to Less Wrong! - Less Wrong

48 Post author: MBlume 16 April 2009 09:06AM

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Comment author: michaelhoney 16 April 2009 11:47:11PM 2 points [-]

I think you're on the right track. There'll be a lot of personal-identity assumptions re-evaluated over the next generation as we see more interpenetration of personal parts as we start to offload cognitive capacity to shared resources on the internet.

Semi-related: I did my philosophy masters sub-thesis [15 years ago, not all opinions expressed therein are ones I would necessarily agree with now] on personal identity and the many-world interpretation of quantum physics. Summary: personal identity is spread/shared along all indistinguishable multiversal branches: indeterminacy is a feature of not knowing which branch you're on. Personal identity across possible worlds may be non-commutative: A=B, B=C, but A≠C.

Comment author: RobinZ 20 July 2009 07:51:36PM 1 point [-]

Technically, that's non-transitive - non-commutative would be A=B but B≠A.

(Also, it is mildly confusing to use an equality symbol to indicate a relationship which is not a mathematical equality relationship - i.e. reflexive, commutative, and transitive.)

(Also, a Sorites-paradox argument would suggest that identity is a matter of degree.)

Comment author: Nick_Tarleton 19 April 2009 02:09:03AM 1 point [-]

Personal identity across possible worlds may be non-commutative: A=B, B=C, but A≠C.

I think I understand (and agree with) the other parts, but how is this possible?