Doonesbury by Garry Trudeau for May 26, 1973
Mark: How'd you like my profile of Haldeman yesterday, B.D.? B.D.: I didn't! You made it sound like he was completely unfit for his job from the start! Mark: But it's true! Have you any idea what H.R. was before he became one of the most powerful mean alive? B.D.: Surprise me! Mark: An advertising executive! With absolutely no experience in government! B.D.: So what?! What does that prove?! How do you know he didn't do a lot of reading up on his own?!