Frankfurt focuses on humbug as he believes it is similar to bullshit but is the more respectful term. Frankfurt uses Black's work on humbug to break down the description of humbug into defining factors: "deceptive misrepresentation",[10] "short of lying”[11] and "misrepresentation... of somebody's own thoughts, feelings, or attitudes."[12] Frankfurt's analysis enables him to distinguish the difference between humbug and lying. The main distinction is the intent that motivates them.