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In 1902, a well-known mathematician wrote an article “proving” that no airplane

could ever fly. Even though the Wright Brothers made their first flight just a year later.

In the 1950s, Britain’s Astronomer Royal said in an interview that the idea of space

travel was “utter bilge.” Also, famous experts claimed that automobiles would never

replace the trolley car. They said the electric light was an impractical gimmick. Clearly,

being an expert doesn’t necessarily give someone a clear vision of the future.