Did Lot's daughters think God had killed every man except Lot?

Did Lot's daughters think God had killed every man except Lot?
No, they knew that God spared the town of Zoar.	Yes.
Genesis 19:21-22, 30 I will not overthrow this city for the which thou hast spoken. Haste thee, escape thither; for I cannot do anything till thou be come thither. Therefore the name of the city was called Zoar. ... And Lot went up out of Zoar, and dwelt in the mountain, and his two daughters with him.	Genesis 19:31 Our father is old, and there is not a man in the earth to come in unto us.