Excellent blog on this by Noah Millman, who chides us for treating the whole

thing as a theorem in social science. People don’t (Noah points out) root their lives in social

science theorems. They couldn’t in fact, since social science doesn’t have

any theorems, is in fact barely science at all. The things we live

by–instinct, custom, myth, faith–have to be taken into account. I think I

can claim to have inoculated myself against this critique to some degree,

having started off my own participation in the thread by saying that

resolution of the social-science issues would, for me, be a necessary

condition for supporting homosexual marriage, but not a sufficient one.