Man will not fly till 1950th

Wilbur Wright : inventor, engineer
"I confess that in 1901, I said to my brother Orville that man would not fly for fifty years . . . Ever since, I have distrusted myself and avoided all predictions."
Prediction became false just in 2 years when Wright brothers experienced the first controlled flight

Wilbur Wright, in a speech to the Aero Club of France, 5 November 1908