Upton Sinclair? H. L. Mencken? William Jennings Bryan? C. E. M. Joad? Christopher Matthews? Paul Krugman? Anonymous? Dear Quote Investigator: Financial incentives can compromise the critical faculties of an individual. Here are four versions of this insight: Never argue with a man whose job depends on not being convinced. It is difficult to get a … Continue reading It Is Difficult to Get a Man to Understand Something When His Salary Depends Upon His Not Understanding It