In the wake of Obama's speech yesterday, there are vast numbers of new converts who now support indefinite "preventive detention." It thus seems constructive to have as dispassionate and fact-based discussion as possible of the implications of "preventive detention" and Obama's related detention proposals (military commissions). I'll have a podcast discussion on this topic a little bit later today with the ACLU's Ben Wizner, which I'll add below, but until then, here are some facts and other points worth noting: