Like the vision of Banquo's lineage, the banquet scene has also been the subject of criticism. Critics have questioned whether not one, but perhaps two ghosts appear in this scene: Banquo and Duncan. Scholars arguing that Duncan attends the banquet state that Macbeth's lines to the Ghost could apply equally well to the slain king. "Thou canst not say I did it", for example, can mean that Macbeth is not the man who actually killed Banquo, or it can mean that Duncan, who was asleep when Macbeth killed him, cannot claim to have seen his killer. To add to the confusion, some lines Macbeth directs to the ghost, such as "Thy bones are marrowless", cannot rightly be said of Banquo, who has only recently died.