A propos:
Thales of Miletus was a philosopher - so committed was he to thinking carefully that once he was walking along contemplating deeply and thus fell into a well. The locals made fun of him, commenting that philosophers were so busy attending to the stars that they could not see what is in front of them.
Since coins were recently invented (or recently brought to Asia Minor), Thales was involved in a discussion over the power of money. His interlocutors didn't believe that a philosopher could become rich, but he insisted that the power of the mind was paramount. To prove the power of having a reasoning mind, he devised a way of predicting weather patterns. He used this knowledge to buy up everyone's olive presses when the weather was bad and managed to corner the market, becoming quite wealthy when a very good season followed soon after.
In "Self-poisoning of the mind" Jon Elster uses the Thales olive incident as an example of a perverse cognitive bias:
...In his retelling of the [Thales olive] story, de Montaigne (1991, p. 153) explicitly asserts that when he condemned money-making, Thales ‘was accused of sour grapes like the fox’. Although Thales wanted to ‘show the world’ that the accusation was unfounded, one could also imagine that he had made a fortune in order to demonstrate to himself that his philosophy was not the product of sour grapes. Not content with thinking that he
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