# Donald Davidson (philosopher)

Donald Herbert Davidson (March 6, 1917 – August 30, 2003) was an American philosopher. He served as Slusser Professor of Philosophy at the University of California, Berkeley, from 1981 to 2003 after having also held teaching appointments at Stanford University, Rockefeller University, Princeton University, and the University of Chicago. Davidson was known for his charismatic personality and the depth and difficulty of his thought. His work exerted considerable influence in many areas of philosophy from the 1960s onward, particularly in philosophy of mind, philosophy of language, and action theory. While Davidson was an analytic philosopher, with most of his influence lying in that tradition, his work has attracted attention in continental philosophy as well, particularly in literary theory and related areas.

## Personal life

Davidson was married three times. His first wife was the artist Virginia Davidson, with whom he had his only child, a daughter, Elizabeth (Davidson) Boyer. Following his divorce from Virginia Davidson, he married for the second time to Nancy Hirschberg, Professor of Psychology at the University of Illinois at Urbana-Champaign and later at Chicago Circle. She died in 1979. In 1984, Davidson married for the third and last time, to philosopher Marcia Cavell. He corresponded with Catholic nun, literary critic and poet M. Bernetta Quinn.

## Swampman

Swampman is the subject of a philosophical thought experiment introduced by Donald Davidson in his 1987 paper "Knowing One's Own Mind". In the experiment, Davidson is struck by lightning in a swamp and disintegrated; simultaneously, an exact copy of Davidson, the Swampman, is made from a nearby tree and proceeds through life exactly as Davidson would have, indistinguishable from Davidson. The experiment is used by Davidson to claim that thought and meaning cannot exist in a vacuum; they are dependent on their interconnections to the world. Therefore, despite being physically identical to himself, Davidson states that the Swampman does not have thoughts nor meaningful language, as it has no causal history to base them on.
The experiment runs as follows:
   Suppose lightning strikes a dead tree in a swamp; I am standing nearby. My body is reduced to its elements, while entirely by coincidence (and out of different molecules) the tree is turned into my physical replica. My replica, The Swampman, moves exactly as I did; according to its nature it departs the swamp, encounters and seems to recognize my friends, and appears to return their greetings in English. It moves into my house and seems to write articles on radical interpretation. No one can tell the difference. But there is a difference. My replica can't recognize my friends; it can't recognize anything, since it never cognized anything in the first place. It can't know my friends' names (though of course it seems to), it can't remember my house. It can't mean what I do by the word 'house', for example, since the sound 'house' it makes was not learned in a context that would give it the right meaning—or any meaning at all. Indeed, I don't see how my replica can be said to mean anything by the sounds it makes, nor to have any thoughts.

## Awards

* Jean Nicod Prize (1995)