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Big question

Could a mind be uploaded?

Mind uploading means scanning a brain in enough detail to run it on another substrate, so that a person carries on after the body fails. Two questions sit inside it. The first is whether the copy would be conscious at all, the same question asked of AI. The second is whether it would be you, or a new person who shares your memories.

Functionalist and many other materialist theories give the most hopeful answers, since on their view the mind is a pattern that can in principle run on other hardware. Identity theorists who tie experience to particular kinds of brain process, and biological theories that require living tissue, are more doubtful. Even a perfect copy faces the puzzle Derek Parfit pressed in ‘Reasons and Persons’ (1984) with his teleporter cases, including one where the original survives beside its duplicate. David Chalmers has argued that gradual uploading, replacing the brain piece by piece, gives a better chance of preserving the self than a single scan.

Dualist theories mostly answer no, because a scan captures the brain and leaves the soul behind. Many idealist theories and theories built on anomalous evidence fall under ‘Not needed’; if consciousness already survives death, a digital copy adds nothing. Panpsychist and neutral monist theories lean toward yes or likely more often than not.

The list below groups every theory under ‘Yes or likely’, ‘Possible or depends’, ‘Uncertain’, ‘Unlikely or no’ or ‘Not needed’, each with a one-line reason drawn from the theory itself. Watch whether a reason concerns consciousness in the copy or the survival of the original person, since theories often answer the two differently.

How the theories answer

123 theories don't take a position on this question.

Yes or likely 92

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Possible or depends 63

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Uncertain 50

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Unlikely or no 118

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Not needed (consciousness persists anyway) 11

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No position (123)

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