Thomas Nagel has a recent post up at The Stone (the New York Times opinion site), where he presents an outline of the major ideas of his book. Having already discussed some of Nagel’s ideas (do a search for “Nagel” on the main blog page to find the relevant posts), I shall now look at some of what Nagel says in that post.
Nagel begins with these words:
The scientific revolution of the 17th century, which has given rise to such extraordinary progress in the understanding of nature, depended on a crucial limiting step at the start: It depended on subtracting from the physical world as an object of study everything mental – consciousness, meaning, intention or purpose.
I see that as a seriously mistaken view of science. By way of example, scientists use a lot of mathematics. And mathematics is very much an intentional activity. Most mathematicians agree that mathematics is not about reality. And then there is computer science, which studies ways of processing information. Information is an intentional entity, not a physical entity. The physical computer is an electro-magnetic device, but much of our study of computation is in terms of bits (binary digits) which exist only as an intentional interpretation of the electro-magnetic signals. The claim that intention and purpose have been abolished does not fit the evidence of what we see coming from science.