The scenes were unthinkable just two months ago, when Scioli was so far ahead that many pundits predicted he would win in the first round.
But for now, city officials, nonprofit groups and civic activists are digesting the fact that a debate that would have been unthinkable before the storm has gone, so far, relatively smoothly.
The government has so far refused to stand down, but it's not unthinkable that an international media outcry could force its hand.
These living arrangements spill over into geography: Without Social Security it is unthinkable that so many elderly people would be living in Sunbelt retirement communities, so far from their children.
It seemed that perhaps what the Egyptian revolution has so far delivered most successfully is an atmosphere of open discussion, something that was unthinkable under Mubarak.
But it has had little success in bringing down long-term mortgage rates so far, even though Treasury bonds are trading at levels so low to have been unthinkable as recently as the summer.
At least one banking analyst has gone so far as to call for him to resign, a scolding that, until now, would have seemed unthinkable.
