In Praise of Irrationality

“The trouble with market research is that people don’t think what they feel, they don’t say what they think, and they don’t do what they say.” — David Ogilvy Beautiful equations are seductive. Mathematics brings logic and structure to a

My $2 Million Apple Mistake

It was Thanksgiving weekend twenty years ago. I had been watching the stock for a couple of months. It was pummeled on soft results in September and seemed cheap to me. On Sunday night, I looked at the Value Line

Farnam Street’s Great Mental Models

“So whatever you wish that men would do to you, do so to them; for this is the law and the prophets.” — The Golden Rule as expressed in Matthew 7:12 Hanlon’s Razor advises us to give others the benefit

The Case for Balanced Skepticism

Social norms govern how individuals interact with each other and with society at large. Many norms have been incorporated into legal systems but most continue to be informal conventions. A significant percentage of the population will fail to adhere to

The Hazards of Talking to Strangers

“So, guys, how did the trip to Japan go? Did you get the software installed?” “It was great! The clients loved us and are super happy about the installation! The boss even took us out for dinner the last night

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