At first glance, General R. Asquith suggested that the Space Pig was a hoax or a dummy. Toshiko Sato, however, determined that it was alive. (TV: Aliens of London) The Slitheen craft crashing into Big Ben was soon regarded as a hoax, much to the disbelief of Mickey Smith. As the Ninth Doctor explained: (TV: World War Three)
They're just not ready. You're happy to believe in something that's invisible, but if it's staring you in the face, nope, can't see it. There's a scientific explanation for that. You're thick.
Donna Noble believed that the replica of the Titanic flying over Buckingham Palace on Christmas Day 2008 was a hoax. (TV: Partners in Crime) In Donna's World, a BBC News 24 newsreader insisted that the spaceship Titanic was not a hoax as it plummeted to Buckingham Palace. (TV: Turn Left)