In the art of the con, magicians and swindlers and forgers insist, the ideal victim is not an ignoramus but an expert. Any magician would rather take on a roomful of physicists than of 5-year-olds. “When you’re certain you cannot be fooled,” wrote the magician Teller, “you become easy to fool.”
Experts make the best victims because they jump to unwarranted conclusions. […]
In one recent test, psychologists asked 32 volunteers to sample strawberry yogurt. To make sure the testers made their judgments purely on the basis of taste, the researchers said, they needed to turn out the lights. Then they gave their subjects chocolate yogurt. Nineteen of the 32 praised the strawberry flavor. One said that strawberry was her favorite flavor and she planned to switch to this new brand.
(Edward Dolnick – Fish or Foul?)