Benjamin Franklin? Benjamin Rush? David Pitcairn? William Wadd? George G. Sigmond? Anonymous?

Question for Quote Investigator: Charlatans who provide fraudulent medical advice and dubious nostrums have afflicted humankind for centuries. Misguided patients often boost these deceivers the most. Here are two versions of a pertinent saying:
(1) There are no greater liars than quacks, except for their patients.
(2) Quacks are the greatest liars in the world, except their patients.
This saying has been attributed to U.S. statesman Benjamin Franklin, U.S. physician Benjamin Rush, and Scottish physician David Pitcairn. Would you please explore this topic?
Reply from Quote Investigator: A conversation about quacks between Benjamin Rush and Benjamin Franklin was described in a diary entry written by Rush which was dated September 22, 1788. The saying under examination was mentioned, but the attribution was anonymous. The word “liars” was spelled “lyers”. Boldface added to excerpts by QI:1
Waited upon Dr. Franklin with Doctor Thibou, of Antigua. The Dr. said few but quacks ever made money by physic, & that no bill drawn upon the credulity of the people of London by quacks, was ever protested. He ascribed the success of quacks partly to patients extolling the efficacy of the remedies they took from them, rather than confess their ignorance & credulity, hence it was justly said, “quacks were the greatest lyers in the world, except their patients.”
Rush’s 1788 diary entry appeared in “The Pennsylvania Magazine of History and Biography” in 1905 within an article titled “Excerpts from the Papers of Dr. Benjamin Rush”. QI believes that this diary entry is credible; however, QI has not yet seen scans of the handwritten diary entry.
The passage is ambiguous, but it seems that the saying was spoken by Benjamin Franklin to Rush. The prefatory phrase “it was justly said” signaled that the attribution was anonymous.
Below are additional selected citations in chronological order.
Continue reading “Adage Origin: Quacks Are the Greatest Liars in the World, Except Their Patients”







