rebdoniel: So you have no problem saying that a get may not be valid when most Rabbonim hold it’s fine, but when some Rabbi claims the entire marriage is voided, and there’s no get at all (not even a questionable one), you think it’s fine and won’t lead to any mamzerim?
As for the Rambam school being mixed, R’ Schachter has said that R’ Soloveitchik had it mixed out of necessity. There weren’t enough girls to allow for separate classes, so he mixed them. It was to only be temporary until the class size grew. He said that other schools asked R’ Soloveitchik about it, and he told them NOT to mix the classes, they should remain separate.