Janet Maslin: “When Nora Ephron wrote about her early aspiration to be the only lady at the table, the sharpest wit in the room, she called this her ‘Dorothy Parker problem.’ … Dorothy Parker set an example for scathingly smart female journalists of Ms. Ephron’s generation, but Ms. Ephron’s five-decade-long career outdid that. It’s now the Nora Ephron problem instead.”