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IT’S kind of scary when you think about it; no one can possibly know what the future holds. Not really.

We can make an educated prediction, yes, based upon facts. Like, for example, the way environmental experts say we will, one day, reach peak oil. Predictions like this usually hold some authority.

Sometimes, however, people — and usually some know-it-all trying to shoot down an idea — make predictions that couldn’t be further from the truth. And sometimes they are proven wrong.

Here are some excellently satisfying examples of just that: 15 people making spectacular fools of themselves with famous predictions gone superbly wrong. Take note: the next time someone shoots down your idea they could be totally wrong!

1. The iPod

Business mogul Lord Alan Sugar on the fate of Apple’s iPod back in 2005.

2. The Beatles

A Decca Records executive to the band’s manager, Brian Epstein, following an audition in 1962. He continued: “We don’t like your boys’ sound. Groups are out. Four-piece groups with guitars, particularly, are finished.”

3. The automobile

The president of the Michigan Savings Bank advising Henry Ford’s lawyer not to invest in the Ford Motor Co., 1903.

4. The train

Dr. Dionysys Larder, science writer and academic, in 1828.

5. Rock ‘n’ Roll

On rock ‘n’ roll, Variety magazine in 1955.

6. A female Prime Minister

Margaret Thatcher, future Prime Minister, October 26th, 1969.

7. Online shopping

Time magazine, 1966.

8. Harry Potter

Anonymous publishing executive writing to J.K Rowling, 1996.

9. X-rays

Lord Kelvin, President of the Royal Society, 1883.

10. Machine guns

Hiram Maxim, inventor of the machine gun, in response to the question “Will this gun not make war more terrible?” from Havelock Ellis, an English scientist, 1893.

11. The iPhone

Microsoft CEO Steve Ballmer, 2007.

12. Rockets

The New York Times, 1936.

13. Nuclear energy

Albert Einstein, 1932.

14. Photocopiers

IBM, to the eventual founders of Xerox, saying the photocopier had no market large enough to justify production, 1959.

15. The telephone

William Orton, president of Western Union, in 1876, when Alexander Graham Bell tried to sell the company his invention.

This article originally appeared on AskMen. For more content like this click here.