Poor Charlie's Almanack: The Essential Wit and Wisdom of Charles T. Munger · chapter 1 · id poor-charlies-almanack-c1-01-munger-identifies-25-standard-

“Munger identifies 25 'standard causes of human misjudgment' that he developed from personal business and legal experience before cross-referencing with academic psychology.”

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Receipts

Poor Charlie's Almanack (Chapter 11, expanded edition 2005)source alive
I came to this after a life in the law and a life in business... I was not a psychology major. I was not a psychologist. I just used my own mental tools.
Transcript of 1995 Harvard Law School speechsource alive
Munger credits reading Cialdini's 'Influence' relatively late and being surprised how much overlap there was with his own independently developed list.

This claim is a stable, citable object. If you can falsify a verdict, tell us — corrections are loud here.