Eric Olson – The Phantom Self

In a new paper, “We Are Not Human Beings,” Derek Parfit argues that persons are identically their conscious, thinking parts, which he identifies as their cerebrums. This is a significant departure from the position he defended in Reasons and Persons, that personal identity consists in non-branching psychological continuity and connectedness with any cause:

Our identity over time just involves (a) Relation R—psychological connectedness and/or psychological continuity, either with the normal cause or with any cause, provided (b) that there is no different person who is R-related to us as we once were. ^{[Parfit, 1984, p 216]}

I call Parfit’s new view a “retreat” because it is a move away from the radical insights about what we are which illuminated Reasons and Persons, to a ‘conservative’ account of persons as physical substances. I find the move puzzling, because I can’t see that Parfit is compelled to make it, and disappointing, because it raises once again the fog of mysteries about persons that looked well on their way to being dispelled.

Parfit’s claim that persons are their cerebrums has as a direct consequence that persons cannot survive information-based teleportation. If I plan to be teleported to Mars, I should accept that my replica on Mars will not be me, because my replica’s cerebrum is numerically different from my cerebrum. The cerebrum is a body part, which, like any other ordinary material object, ceases to exist when it is destroyed. Its replica on Mars is a different cerebrum—hence, if Parfit is right, a different person.

Parfit has long thought that survival—a person’s continued existence—is different from what matters in survival. His new view on what persons are could perhaps coexist with his earlier position that information-based teleportation preserves everything that matters in survival. But such coexistence, I will argue, is an uneasy truce between fundamentally warring ideas. An alternative account of what persons are—informational entities—is a better fit to Parfit’s intuition (which I endorse) that nothing important need be lost in teleportation of persons.

“Why We Are Not Human Beings” is Parfit’s response to animalism—the view put forward by Eric Olson and others that persons are identical to animals, or biological organisms. (In the animalist literature, “human being” is used as a synonym for “human animal.”) In this review of Parfit’s paper, I raise the following points:

The arguments Parfit brings to bear against animalism rely on an intuition that has equal force against the paper’s conclusion that persons are their cerebrums.
The claim that persons are their brains was strongly rejected in Reasons and Persons for reasons that supported a central argument of that book. If we were identical to our cerebrums, Parfit’s main argument against the Self-Interest Theory would be undercut in the same way that it would be if we were identical to our (whole) brains.
The claim that we are our cerebrums weakens Parfit’s argument in Reasons and Persons that “ordinary survival is about as bad as being destroyed and having a Replica.” If I am my cerebrum, it is hard to believe that destruction of my cerebrum is not especially bad for me, even if a replica of my cerebrum is manufactured in its stead. Continue reading “Parfit’s Retreat: “We Are Not Human Beings””

We are not Cartesian egos. We are not biological organisms either.

Not Cartesian egos

A Cartesian ego is a kind of mental or spiritual thing that is thought to inhabit a human body and give it life. Many people believe we can exist independently of a human body – that we survive the death of our bodies, continuing to have experiences either without a body, or by being reborn in another body.

I hardly need to argue against Cartesian egos. The idea is in widespread disrepute without any assistance from me. It is hard to reconcile with a scientific view of the world. We have no convincing evidence that such things exist. Until we have, we should use Occam’s Razor for its intended purpose to prune them from our conceptual scheme. Leaving them in creates clutter and awkward problems.

One problem comes from split brain research. When the corpus callosum connecting a patient’s two cerebral hemispheres is cut, two centres of consciousness appear where there was one before. Should we conclude that the surgeon’s knife divided a spiritual substance? Instead of deepening our understanding, this multiplies mysteries.

Despite its academic unrespectability, the idea that we are Cartesian egos is embraced by billions of people. It is deeply involved with emotion, as this passage from Umberto Eco’s novel The Mysterious Flame of Queen Loana illustrates:

One evening the spiritual director stood in front of the altar balustrade, illuminated – like all of us, like the entire chapel – by that single candle that haloed him in light, leaving his face in darkness. Before dismissing us, he told us a story. One night, in a convent school, a girl died, a young, pious, beautiful girl. The next morning, she was stretched out on a catafalque in the nave of the church, and the mourners were reciting their prayers for the deceased, when all of a sudden the corpse sat up, eyes wide and finger pointing at the celebrant, and said in a cavernous voice, “Father, do not pray for me! Last night I had an impure thought, a single thought – and now I am damned!” Continue reading “What We Are Not”