Think carefully before you write or speak! The passage of time has the uncanny ability of proving you right or wrong! Consider these statements, reportedly made by leading minds of yesteryear ...
Inventions have long since reached their limit, and I see no hope for further development. Julius Frontinus (highly respected engineer in Rome, 1st century A.D.)
Everything that can be invented has been invented. C. Duell, Commissioner, U.S. Office of Patents, 1899
A man has been arrested in New York for attempting to extort funds from ignorant and superstitious people by exhibiting a device which he says will convey the human voice any distance over metallic wires so that it will be heard by the listener at the other end. He calls this instrument a telephone. Well-informed people know that it is impossible to transmit the human voice over wires. News item in an 1868 New York paper
This telephone has too many shortcomings to be seriously considered as a means of communication. This device is inherently of no value to us. Western Union, 1876
Radio has no future. Heavier-than-air flying machines are impossible. X-rays will prove to be a hoax. William Thomson, Lord Kelvin English scientist, 1899
Who the hell wants to hear actors talk? H.M. Warner, Warner Brothers, 1927
I'm just glad it will be Clark Gable who falls on his face, not Gary Cooper. Gary Cooper on his decision not to take the leading role in Gone With The Wind.
We don't like their sound, and guitar music is on the way out. Decca Records, 1962 (rejecting the Beatles)
I think there is a world market for maybe 5 computers. Thomas Watson, Chairman of IBM, 1943
Computers in the future may weigh no more than 1.5 tons. Popular Mechanics, 1949
But what is it good for?" commenting on the microchip. Engineer at the Advanced Computing Systems Division of IBM, 1968
There is no reason anyone would want a computer in their home. Ken Olson, president, chairman, founder of Digital Equipment Corp., 1977
640K of RAM ought to be enough for anybody. Bill Gates, Chairman of Microsoft, 1981
The super computer is technologically impossible. It would take all of the water that flows over Niagara Falls to cool the heat generated by the number of vacuum tubes required. Professor of Electrical Engineering, New York University
I have traveled the length and breadth of this country and talked with the best people, and I can assure you that data processing is a fad that won't last out the year. The editor in charge of business books for Prentice Hall, 1957
There is not the slightest indication that nuclear energy will ever be obtainable. It would mean that the atom would have to be shattered at will. Albert Einstein, 1932
There is no likelihood man can ever tap the power of the atom. Robert Millikan, Nobel Prize in Physics, 1923
The wireless music box has no imaginable commercial value. Who would pay for a message sent to nobody in particular? In response to urgings for investment in the radio in the 1920s. David Sarnoff' Associates (president of RCA)
Louis Pasteur's theory of germs is ridiculous fiction. Pierre Pachet, Professor of Physiology at Toulouse, 1872
The abdomen, the chest, and the brain will forever be shut from the intrusion of the wise and humane surgeon. Sir John Eric Ericksen, British surgeon, appointed Surgeon-Extraordinary to Queen Victoria 1873
Stocks have reached what looks like a permanently high plateau. Irving Fisher, Professor of Economics, Yale University, 1929
The concept is interesting and well-formed, but in order to earn better than a 'C', the idea must be feasible. A Yale University management professor in response to Fred Smith's paper proposing reliable overnight delivery service. Smith went on to found Federal Express.
A cookie store is a bad idea. Besides, the market research reports say America likes crispy cookies, not soft and chewy cookies like you make. Response to Debbi Fields' idea of starting Mrs. Fields' Cookies
If I had thought about it, I wouldn't have done the experiment. The literature was full of examples that said you can't do this. Spencer Silver on the work that led to the unique adhesives for 3-M "Post-It" Notepads.
Drill for oil? You mean drill into the ground to try and find oil? You're crazy." Drillers who Edwin L. Drake tried to enlist to his project to drill for oil, 1859
I don't know what use any one could find for a machine that would make copies of documents. It certainly couldn't be a feasible business by itself. The head of IBM, refusing to back the idea, forcing the inventor to found Xerox
Airplanes are interesting toys but of no military value. Marechal Ferdinand Foch, Professor of Strategy, Ecole Superieure de Guerre, France
And last but not least... There will never be a bigger plane built. Boeing engineer after the first flight of the 247; a twin engine plane that carried ten people.