Online research in philosophy

Most philosophers writing about personal identity in recent years claim that what it takes for us to persist through time is a matter of psychology. In this groundbreaking new book, Eric Olson argues that such approaches face daunting problems, and he defends in their place a radically non-psychological account of personal identity. He defines human beings as biological organisms, and claims that no psychological relation is either sufficient or necessary for an organism to persist. Olson rejects several famous thought-experiments dealing with personal identity. He argues, instead, that one could survive the destruction of all of one's psychological contents and capabilities as long as the human organism remains alive--as long as its vital functions, such as breathing, circulation, and metabolism, continue.

Olson (1997a) tries to refute the Psychological Approach to personal identity with his Fetus Argument, and Mackie (1999) aims to do the same with the Death Argument. With the help of a suggestion made by Baker (1999), the following discussion shows that these arguments fail. In the process of defending the Psychological Approach, it is made clear exactly what one is and is not committed to as a proponent of the theory.

Eric T. Olson has argued that any view of personal identity in terms of psychological continuity has a consequence that he considers untenable-namely, that he was never an early-term fetus. I have several replies. First, the psychological-continuity view of personal identity does not entail the putative consequence; the appearance to the contrary depends on not distinguishing between de re and de dicto theses. Second, the putative consequence is not untenable anyway; the appearance to the contrary depends on not taking seriously an idea that underlies a plausible view of persons that I call `the Constitution View.' Finally, Olson's own "Biological View of personal identity" has liabilities of its own.

I take Eric Olson’s account of personal identity to have two components. First there is his characterization of the problem of personal identity. Here’s a paraphrase of some things Olson says on p. 23 of The Human Animal.1..

The Standard View of personal identity says that someone who exists now can exist at another time only if there is continuity of her mental contents or capacities. But no person is psychologically continuous with a fetus, for a fetus, at least early in its career, has no mental features at all. So the Standard View entails that no person was ever a fetus--contrary to the popular assumption that an unthinking fetus is a potential person. It is also mysterious what does ordinarily happen to a human fetus, if it does not come to be a person. Although an extremely complex variant of the Standard View may allow one to persist without psychological continuity before one becomes a person but not afterwards, a far simpler solution is to accept a radically non-psychological account of our identity.

One reason why the Biological Approach to personal identity is attractive is that it doesn’t make its advocates deny that they were each once a mindless fetus.[i] According to the Biological Approach, we are essentially organisms and exist as long as certain life processes continue. Since the Psychological Account of personal identity posits some mental traits as essential to our persistence, not only does it follow that we could not survive in a permanently vegetative state or irreversible coma, but it would appear that none of us was ever a mindless fetus. But what happens to the organism that was a mindless fetus when the _person_ arrives on the scene?[ii] Can the acquisition of thought destroy an organism? That would certainly be news to biologists. Does one organism cease to exist with the emergence of thought and another organism, one identical to the person, take its place? (Burke,1994) That doesn’t seem much more plausible than the previous move. Should identity and Leibniz.

Eric T. Olson has argued that any view of personal identity in terms of psychological continuity has a consequence that he considers untenable-namely, that he was never an early-term fetus. I have several replies. First, the psychological-continuity view of personal identity does not entail the putative consequence; the appearance to the contrary depends on not distinguishing between de re and de dicto theses. Second, the putative consequence is not untenable anyway; the appearance to the contrary depends on not taking seriously an idea that underlies a plausible view of persons that I call `the Constitution View.' Finally, Olson's own "Biological View of personal identity" has liabilities of its own.

Eric Olsen argues from the fact that we once existed as fetal individuals to the conclusion that the Standard View of personal identity in mistaken. I shall establish that a similar argument focusing upon dead people opposes Olson's favored Biological View of personal identity.