 Whatever mechanism is used to determine what is accommodated, it must ensure that sometimes conditional presuppositions are strengthened (to become unconditionalized), and sometimes they aren’t. What examples like (38) and (39) suggest is that this might be explained in terms of plausibility: it could be that the conditional in (39c) is strengthened because it seems implausible that a speaker would be assuming that Theo’s generosity was linked to his ownership of aquatic paraphernalia, whereas it seems more plausible that a speaker would simply be assuming that Theo owned such equipment.