Sleeping Beauty: Reply to Elga: "Researchers at the Experimental Philosophy Laboratory... Sleeping Beauty...:
...On Sunday evening they will put her to sleep [P-]. On Monday they will awaken her briefly. At first they will not tell her what day it is [P], but later they will tell her that it is Monday [P+]. Then they will subject her to memory erasure. Perhaps they will again awaken her briefly on Tuesday... depend[ing] on the toss of a fair coin: if heads they will awaken her only on Monday, if tails they will awaken her on Tuesday as well.... We shall need to consider her credence functions at three different times.