Rolf Dobelli quotes Charlie Munger on the "man with the hammer tendency"

"If your only tool is a hammer, all your problems will be nails," said Mark Twain - a quote that sums up the déformation professionnelle perfectly.  Charlie Munger, Warren Buffett's business partner, named the effect the "man with the hammer tendency" after Twain: "But that's a perfectly disastrous way to think and a perfectly disastrous way to operate in the world.  So you've got to have multiple models.  And the models have to come from multiple disciplines - because all the wisdom of the world is not to be found in one little academic department."

~ Rolf Dobelli, The Art of Thinking Clearly, "Those Wielding Hammers See Only Nails," pp. 275-276