Isaac Asimov? Harold Coffin? Unitarian Church Bulletin? Robert Reisner? Joey Adams? Milton Berle? Robert K. Mueller? Anonymous?

Question for Quote Investigator: Know-it-alls are eager to assert their expertise on all subjects. I love the following comical reaction to grandiose egotism:
Those who believe they know everything are a great nuisance to those of us who do.
The science fiction grandmaster Isaac Asimov has received credit for this line, but I have been unable to find any solid evidence. Would you please explore this topic?
Reply from Quote Investigator: This quip is difficult to trace because it has been expressed in many different ways, and it has evolved over time. Here is a sampling:
- The fellow who thinks he knows it all is especially annoying to those of us who do.
- People who think they know everything are terribly irritating to those of us who do.
- Those who think they know it all upset those of us who do.
- Those who think they know it all are very annoying to those who do.
- People who think they know everything always annoy those of us who do.
- People who think they know it all always bug people who do.
- People who think they know everything are a great annoyance to those of us who do.
The earliest match located by QI appeared as a filler item in “The Saturday Evening Post” in 1961. Emphasis added to excerpts by QI:1
The fellow who thinks he knows it all is especially annoying to those of us who do.
HAROLD COFFIN
Coffin was a humor columnist with the Associated Press (AP) news service in the 1960s and 1970s. He wrote a feature called “Coffin’s Needle” although QI has not found the joke in Coffin’s AP writings.2
Below are additional selected citations in chronological order.
Continue reading “Quote Origin: The Fellow Who Thinks He Knows It All Is Especially Annoying To Those of Us Who Do”