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.