 There are some reasons for thinking that condition (4) is too strong. Consider, for instance, this case in the literature: You put a glass of ice-cold lemonade on a picnic table in your backyard. You go inside and get a telephone call from a friend and talk for half an hour. When you hang up you remember that you had left the ice-cold lemonade outside exposed to the hot sun and come to believe that it isn’t ice-cold anymore. It would seem that you could know that. Indeed, if it were false, that could only be due to some bizarre circumstance. Thus, if the lemonade were still ice-cold, you would believe that it wasn’t (see Vogel 1987: 206). The moral of this (and similar) cases seems to be that sensitivity is not a correct condition on knowledge.