All I’m saying is that analyzing arguments is a different project than taking positions on ethical, moral or political issues. Neither is objective; both involve opinions; the opinions are, however, about different things, in one case about the best thing to do or think; in the other, about whether the case made for thinking or doing something hangs together. It would be quite possible for me, or anyone else, to fault the arguments made in behalf of a policy or agenda and still support it. I am insisting on the distinction, but no claim to objectivity is involved.
'Think Again: Why I Write These Columns', The New York Times, March 9, 2008
http://fish.blogs.nytimes.com/2008/03/09/why-i-write-these-columns/