Explain melinda conflict in charpter entiteled "stupid ,stupid", using melinda 1 and melinda 2 what does the charpter refer to

David Petrakis invites Melinda to accompany him and his friends to his house for pizza. Part of melinda wants to go and part of her doesn't. She feels like there are two Melinda's inside of her. An argument rages in her head, with a voice she calls Melinda One asserting that she should have gone to the party after all and join the world of the living. A voice she calls Melinda Two argues David' invitation is merely a ploy to lure her to his house.